Updated list of publications on PubMed, please click the link below:

https://www.ncbi.nlm.nih.gov/myncbi/16uVRzeeBPOkH/bibliography/public/

Academic article

• Aurora Jørnsdatter Kojen; Thomas Halvorsen; Astrid Gjelstad et al. (2026). Reported use of anti-asthmatic medication in doping control forms from 2015 to 2019 – mapping retrospective data. (external link)
• Sahrai Saeed; Petter Carlsen; Praveen Muralitharan et al. (2026). Prevalence and clinical significance of T-wave inversion on electrocardiogram in patients with exercise-induced laryngeal obstruction (EILO): A cross-sectional study. (external link)
• Anne-Lise Bjørke Monsen; Ingrid Kristin Torsvik; Mariann Haavik Lysfjord Bentsen et al. (2026). Exclusive Breastfeeding Is Not Ensuring an Adequate Vitamin B Status in Premature Infants with Very Low Birth Weight. (external link)
• Julie Vestavik Berge; Silje Nesthus; Merete Røineland Benestad et al. (2026). Self-reported pain sensitivity in adults born extremely preterm compared to term-born controls: A matched cohort study. (external link)
• Karen Galta Sørensen; Knut Asbjørn Alexander Øymar; Ingvild Dalen et al. (2025). Bronchial hyper-reactivity in young adults after hospitalisation for bronchiolitis in infancy. (external link)
• Anne Kristine Brekka; Maria Vollsæter; Zoe Fretheim-Kelly et al. (2025). Exploring upper airway and laryngeal resistance to noninvasive ventilation in healthy awake adults. (external link)
• Petter Carlsen; Praveen Muralitharan; Hilde Fenne et al. (2024). Laryngeal response to high-intensity exercise in healthy athletes. (external link)
• Sailesh Kotecha; Hege Synnøve Havstad Clemm; Thomas Halvorsen et al. (2018). Bronchial hyper-responsiveness in preterm-born subjects: A systematic review and meta-analysis. (external link)
• Thomas Halvorsen; Britt Torunn Skadberg; Geir Egil Eide et al. (2004). Pulmonary outcome in adolescents of extreme preterm birth: a regional cohort study. (external link)
• Liesbeth Duijts; Evelien R. van Meel; Laura Moschino et al. (2020). European Respiratory Society guideline on long-term management of children with bronchopulmonary dysplasia. (external link)
• Zoe Fretheim-Kelly; Thomas Halvorsen; John-Helge Heimdal et al. (2019). Feasibility and tolerability of measuring translaryngeal pressure during exercise. (external link)
• Anne Lise Bjørke Monsen; Maria Vollsæter; Per Magne Ueland et al. (2016). Increased bronchial hyperresponsiveness and higher asymmetric dimethylarginine levels after fetal growth restriction. (external link)
• Paul Leong; Anne E. Vertigan; Mark Hew et al. (2023). Diagnosis of vocal cord dysfunction/inducible laryngeal obstruction: an International Delphi Consensus Study. (external link)
• Maria Vollsæter; Kaia Skromme; Emma Elsa Carolina Satrell et al. (2015). Children born preterm at the turn of the millennium had better lung function than children born similarly preterm in the early 1990s. (external link)
• Maria Vollsæter; Hege Synnøve Havstad Clemm; Emma Elsa Carolina Satrell et al. (2015). Adult respiratory outcomes of extreme preterm birth. A regional cohort study.. (external link)
• Astrid Sandnes; Tiina Maarit Andersen; Hege Synnøve Havstad Clemm et al. (2019). Exercise-induced laryngeal obstruction in athletes treated with inspiratory muscle training. (external link)
• Thomas Halvorsen; Britt Torunn Skadberg; Geir Egil Eide et al. (2005). Assessment of lung volumes in children and adolescents: comparison of two plethysmographic techniques. (external link)
• Ingvild Bruun Mikalsen; Thomas Halvorsen; Pétur Benedikt Juliusson et al. (2021). Early life growth and associations with lung function and bronchial hyperresponsiveness at 11-years of age. (external link)
• Henriette Lahn-Johannessen Lillebøe; Merete Salveson Engeseth; Hege Synnøve Havstad Clemm et al. (2024). Expiratory airflow limitation in adults born extremely preterm: A systematic review and meta-analysis. (external link)
• Emma Satrell; Ola Drange Røksund; Einar Thorsen et al. (2013). Pulmonary gas transfer in children and adolescents born extremely preterm. (external link)
• Thomas Halvorsen; Håvard Valvatne; Harleen Grewal et al. (1997). Expression of colonization factor I fimbriae by enterotoxigenic Escherichia coli; influence of growth conditions and a recombinant positive regulatory gene. (external link)
• Stein Magnus Aukland; Thomas Halvorsen; Kari Fosse et al. (2006). High-resolution CT of the chest in children and young adults who were born prematurely: Findings in a population-based study. (external link)
• Berit Båtsvik; Bente Johanne Vederhus; Thomas Halvorsen et al. (2015). Health-related quality of life may deteriorate from adolescence to young adulthood after extremely preterm birth. (external link)
• John-Helge Heimdal; Ola Drange Røksund; Thomas Halvorsen et al. (2006). Continuous laryngoscopy exercise test: a method for visualizing laryngeal dysfunction during exercise. (external link)
• Kristine Marie Stangenes; Mari Hysing; Irene Bircow Elgen et al. (2019). Sleep problems, behavioural problems and respiratory health in children born extremely preterm: a parental questionnaire study. (external link)
• Knut Øymar; Jakob Havnen; Thomas Halvorsen et al. (2001). Eosinophil counts and urinary eosinophil protein X in children hospitalized for wheezing during the first year of life: prediction of recurrent wheezing. (external link)
• Astrid Sandnes; Magnus Hilland; Maria Vollsæter et al. (2019). Severe exercise-induced laryngeal obstruction treated with supraglottoplasty. (external link)
• Astrid Haugen Lie; Ingvild Grønnevik; Bente Frisk et al. (2021). Breathing patterns in people with exercise-induced laryngeal obstruction. (external link)
• Hege Synnøve Havstad Clemm; Maria Vollsæter; Ola Drange Røksund et al. (2014). Exercise capacity after extremely preterm birth: Development from adolescence to adulthood. (external link)
• Knut Øymar; Thomas Halvorsen; Lage Aksnes (2006). Mast cell activation and leukotriene secretion in wheezing infants. Relation to respiratory syncytial virus and outcome. (external link)
• Mariann Bentsen; Øystein Ariansen Haaland; Lise Broll Lønning et al. (2015). A new non-invasive method of infant spirometry demonstrates a level of repeatability that is comparable to traditional methods. (external link)
• Karen Galta Sørensen; Knut Asbjørn Alexander Øymar; Ingvild Dalen et al. (2022). Asthma, atopy and lung function in young adults after hospitalisation for bronchiolitis in infancy: Impact of virus and sex. (external link)
• Hege Synnøve Havstad; Ola Drange Røksund; Einar Thorsen et al. (2012). Aerobic capacity and exercise performance in young people born extremely preterm. (external link)
• Hege Synnøve Havstad Clemm; Maria Vollsæter; Ola Drange Røksund et al. (2015). Adolescents who were born extremely preterm demonstrate modest decreases in exercise capacity. (external link)
• Karen Galta Sørensen; Knut Øymar; Ingvild Dalen et al. (2019). Lung function and bronchial hyper-reactivity from 11 to 18 years in children with bronchiolitis in infancy. (external link)
• Ingvild Bruun Mikalsen; Thomas Halvorsen; Knut Øymar (2012). The outcome after severe bronchiolitis is related to gender and virus. (external link)
• Guro Pauck Bernhardsen; Julie Stang; Thomas Halvorsen et al. (2022). Differences in lung function, bronchial hyperresponsiveness and respiratory health between elite athletes competing in different sports. (external link)
• Elisabeth Berge Budal; Mariann Bentsen; Jørg Kessler et al. (2023). Histologic chorioamnionitis in extremely preterm births, microbiological findings and infant outcome. (external link)
• Mette Engan; Maria Vollsæter; Knut Øymar et al. (2019). Comparison of physical activity and body composition in a cohort of children born extremely preterm or with extremely low birth weight to matched term-born controls: a follow-up study. (external link)
• Thomas Halvorsen; Emil Schwarz Walsted; Caterina Bucca et al. (2017). Inducible laryngeal obstruction: An official joint European Respiratory Society and European Laryngological Society statement. (external link)
• Astrid Sandnes; Tiina Maarit Andersen; Hege Synnøve Havstad Clemm et al. (2021). Clinical responses following inspiratory muscle training in exercise-induced laryngeal obstruction. (external link)
• Praveen Muralitharan; Petter Carlsen; Magnus Hilland et al. (2023). Use of inhaled ipratropium bromide to improve exercise-induced laryngeal obstruction cannot be recommended. (external link)
• Tiina Maarit Andersen; Thomas Halvorsen; Ove Fondenes et al. (2019). Larynx: The Complex Gateway to the Lungs. (external link)
• Robert Maat; Ola Drange Røksund; Thomas Halvorsen et al. (2009). Audiovisual assessment of exercise-induced laryngeal obstruction: reliability and validity of observations. (external link)
• Merete Benestad; Jorunn Drageset; Geir Egil Eide et al. (2022). Development of health-related quality of life and subjective health complaints in adults born extremely preterm: a longitudinal cohort study. (external link)
• Mette Engan; Ida Jansrud; Marianne Bekken et al. (2021). Reliability of maximum oxygen uptake in cardiopulmonary exercise testing with continuous laryngoscopy. (external link)
• Åse Johnsen Rogde; Sverre Lehmann; Thomas Halvorsen et al. (2023). Prevalence and impact of exercise-induced laryngeal obstruction in asthma: a study protocol for a cross-sectional and longitudinal study. (external link)
• Hege Synnøve Havstad Clemm; Astrid Sandnes; Maria Vollsæter et al. (2018). The Heterogeneity of Exercise-induced Laryngeal Obstruction.. (external link)
• Ingvild Bruun Mikalsen; Thomas Halvorsen; Geir Egil Eide et al. (2013). Severe bronchiolitis in infancy: Can asthma in adolescence be predicted?. (external link)
• Merete Benestad; Jorunn Drageset; Karl Ove Hufthammer et al. (2022). Long-term follow-up of self-reported mental health and health-related quality of life in adults born extremely preterm. (external link)
• Ingvild Bruun Mikalsen; Thomas Halvorsen; Knut Øymar (2013). Exhaled nitric oxide is related to atopy, but not asthma in adolescents with bronchiolitis in infancy. (external link)
• Marianne Sentenac; Valerie Benhammou; Ulrika Aden et al. (2021). Maternal education and cognitive development in 15 European very-preterm birth cohorts from the RECAP Preterm platform. (external link)
• Ola Drange Røksund; Robert Maat; John-Helge Heimdal et al. (2009). Exercise induced dyspnea in the young. Larynx as the bottleneck of the airways. (external link)
• Tiina Maarit Andersen; Astrid Sandnes; Magnus Hilland et al. (2013). Laryngeal response patterns to mechanical insufflation-exsufflation in healthy subjects. (external link)
• Ingvild Bruun Mikalsen; Thomas Halvorsen; Knut Øymar (2014). Blood eosinophil counts during bronchiolitis are related to bronchial hyper-responsiveness and lung function in early adolescence. (external link)
• Julie Hestnes; Hedda Benedicte Hoel; Ole Johan Risa et al. (2017). Ventilatory efficiency in children and adolescents born extremely preterm. (external link)
• Anne Lise Bjørke-Monsen; Thomas Halvorsen; Øyvind Midttun et al. (2013). Increased inflammatory markers in adolescents born extremely preterm and small for gestational age. (external link)
• Kristine Marie Stangenes; Mari Hysing; Silje Katrine Elgen Fevang et al. (2018). Prenatal and neonatal factors predicting sleep problems in children born extremely preterm or with extremely low birthweight. (external link)
• John-Helge Heimdal; Ola Drange Røksund; Thomas Halvorsen et al. (2007). Continuous Laryngoscopy Exercise Test: A Method for Visualizing Laryngeal Dysfunction During Exercise (Letter). (external link)
• Robert Maat; Ola Drange Røksund; Jan Olofsson et al. (2007). Surgical treatment of exercise-induced laryngeal dysfunction. (external link)
• Mariann Bentsen; Trond Markestad; Knut Øymar et al. (2017). Lung function at term in extremely preterm-born infants: A regional prospective cohort study. (external link)
• Emma Elsa Carolina Satrell; Hege Synnøve Havstad Clemm; Ola Drange Røksund et al. (2021). Development of lung diffusion to adulthood following extremely preterm birth. (external link)
• Ola Drange Røksund; Hege Synnøve Havstad; John-Helge Heimdal et al. (2010). Left vocal cord paralysis after extreme preterm birth, a new clinical scenario in adults. (external link)
• Lars Tveiten; Lien My Diep; Thomas Halvorsen et al. (2016). Respiratory rate during the first 24 hours of life in healthy term infants. (external link)
• Thomas Halvorsen; Ola Drange Røksund (2022). A novel validated tool to score symptom burden in exercise-induced laryngeal obstruction: can we simplify patient follow-up and research?. (external link)
• Ingrid Nordeide Kuiper; Cecilie Svanes; Iana Markevych et al. (2021). Lifelong exposure to air pollution and greenness in relation to asthma, rhinitis and lung function in adulthood. (external link)
• Lars Tveiten; Lien My Diep; Thomas Halvorsen et al. (2020). Heart rate during the first 24 hours in term-born infants. (external link)
• Kaia Skromme; Maria Vollsæter; Knut Øymar et al. (2018). Respiratory morbidity through the first decade of life in a national cohort of children born extremely preterm. (external link)
• Ingrid Nordeide Kuiper; Iana Markevych; Simone Accordini et al. (2020). Associations of preconception exposure to air pollution and greenness with offspring asthma and hay fever. (external link)
• Mette Engan; Merete Salveson Engeset; Lorentz Sandvik et al. (2022). Left vocal cord paralysis, lung function and exercise capacity in young adults born extremely preterm with a history of neonatal patent ductus arteriosus surgery—A national cohort study. (external link)
• Ola Drange Røksund; John-Helge Heimdal; Hege Synnøve Havstad Clemm et al. (2016). Exercise inducible laryngeal obstruction: diagnostics and management. (external link)
• Åse Johnsen Rogde; Sverre Lehmann; Hege Synnøve Havstad Clemm et al. (2021). Inducible laryngeal obstruction in asthma. (external link)
• Maria Vollsæter; Thomas Halvorsen; Trond Markestad et al. (2018). Renal function and blood pressure in 11 year old children born extremely preterm or small for gestational age. (external link)
• Tom Hemming Karlsen; Kristine Vreim; Ola Drange Røksund et al. (2024). A speech therapy treatment protocol for exercise induced laryngeal obstruction. (external link)
• Bente Johanne Vederhus; Trond Markestad; Geir Egil Eide et al. (2010). Health related quality of life after extremely preterm birth: a matched controlled cohort study. (external link)
• Thomas Halvorsen; Brit Skadberg; Geir Egil Eide et al. (2005). Characteristics of asthma and airway hyper-responsiveness after premature birth. (external link)
• Tjitske M. van der Zanden; Miriam G. Mooij; Nienke J. Vet et al. (2021). Benefit-Risk Assessment of Off-Label Drug Use in Children: The Bravo Framework. (external link)
• Thomas Halvorsen; Britt Torunn Skadberg; Geir Egil Eide et al. (2006). Better care of immature infants; Has it influenced long-term pulmonary outcome?. (external link)
• Tiina Maarit Andersen; Astrid Sandnes; Ove Fondenes et al. (2018). Laryngeal responses to mechanically assisted cough in progressing amyotrophic lateral sclerosis. (external link)
• Maria Vollsæter; Ola Drange Røksund; Geir Egil Eide et al. (2013). Lung function after preterm birth: development from mid-childhood to adulthood. (external link)
• Astrid Sandnes; Tiina Maarit Andersen; Magnus Hilland et al. (2013). Laryngeal movements during inspiratory muscle training in healthy subjects. (external link)
• Mari Kaarbø; Øyvind Løveseter Mikkelsen; Lene Malerød et al. (2010). PI3K-AKT-mTOR pathway is dominant over androgen receptor signaling in prostate cancer cells. (external link)
• Stein Magnus Aukland; Karen Rosendahl; Catherine M. Owens et al. (2009). Neonatal bronchopulmonary dysplasia predicts abnormal pulmonary HRCT scans in long-term survivors of extreme preterm birth. (external link)
• Merete Røineland Benestad; Jorunn Drageset; Hege Synnøve Havstad Clemm et al. (2021). Self-Reported Health in Adolescents With Exercise-Induced Laryngeal Obstruction; A Cross-Sectional Study. (external link)
• Tiina Maarit Andersen; Astrid Sandnes; Anne Kristine Brekka et al. (2016). Laryngeal response patterns influence the efficacy of mechanical assisted cough in amyotrophic lateral sclerosis. (external link)
• Merete Salveson Engeseth; Mette Engan; Hege Synnøve Havstad Clemm et al. (2020). Voice and Exercise Related Respiratory Symptoms in Extremely Preterm Born Children After Neonatal Patent Ductus Arteriosus. (external link)
• Bente Johanne Vederhus; Geir Egil Eide; Gerd Karin Natvig et al. (2015). Health-related quality of life and emotional and behavioral difficulties after extreme preterm birth: Developmental trajectories. (external link)
• Robert Maat; Magnus Hilland; Ola Drange Røksund et al. (2011). Exercise-induced laryngeal obstruction: natural history and effect of surgical treatment. (external link)
• Mariann Bentsen; Emma Satrell; Hallvard Reigstad et al. (2017). Mid-childhood outcomes after pre-viable preterm premature rupture of membranes. (external link)
• Kristine Vreim; Tom Karlsen; Petter Carlsen et al. (2025). Speech therapy for exercise-induced laryngeal obstruction. (external link)
• Katarina Norlander; Pernille M. Christensen; Robert Maat et al. (2015). Comparison between two assessment methods for exercise-induced laryngeal obstructions. (external link)
• Tiina Maarit Andersen; Ove Fondenes; Ola Drange Røksund et al. (2022). From bedside to bench - In vivo and in vitro evaluation of mechanically assisted cough treatment in a patient with bulbar Amyotrophic Lateral Sclerosis. (external link)
• Bente Johanne Vederhus; Geir Egil Eide; Gerd Karin Natvig et al. (2012). Pain tolerance and pain perception in adolescents born extremely preterm. (external link)
• Tonje Bårdsen; Emma Satrell; Ola Drange Røksund et al. (2024). Lung function outcomes in adults born extremely preterm across three decades of advancing perinatal medicine. (external link)
• Merete Benestad; Jorunn Drageset; Maria Vollsæter et al. (2024). Health-related quality of life in two birth cohorts of extremely preterm born adults. (external link)
• Elisabeth Berge Budal; Cathrine Ebbing; Jørg Kessler et al. (2021). Placental histology predicted adverse outcomes in extremely premature neonates in Norway-population-based study. (external link)
• Karen Galta Sørensen; Knut Asbjørn Alexander Øymar; Ingvild Dalen et al. (2023). Blood eosinophils during bronchiolitis: Associations with atopy, asthma and lung function in young adults. (external link)
• Laurence Hoareau; Agnete Engelsen; Marianne Aanerud et al. (2021). Induction of alveolar and bronchiolar phenotypes in human lung organoids. (external link)
• Mariann Bentsen; Morten Eriksen; Merete Susan Olsen et al. (2016). Electromagnetic inductance plethysmography is well suited to measure tidal breathing in infants. (external link)
• Anne Kristine Brekka; Maria Vollsæter; George Ntoumenopoulos et al. (2022). Adjustments of non-invasive ventilation and mechanically assisted cough by combining ultrasound imaging of the larynx with transnasal fibre-optic laryngoscopy: A protocol for an experimental study. (external link)
• Tiina Maarit Andersen; Anne Kristine Brekka; Zoe Fretheim-Kelly et al. (2025). Upper Airway and Translaryngeal Resistance During Mechanical Insufflation-Exsufflation. (external link)
• Camilla Tvedt Ekanger; Fan Zhou; Dana Bohan et al. (2022). Human organotypic airway and lung organoid cells of bronchiolar and alveolar differentiation are permissive to infection by influenza and SARS-CoV-2 respiratory virus. (external link)
• Ida Jansrud; Thomas Halvorsen; Maria Vollsæter et al. (2022). Conundrums in the breathless athlete; exercise-induced laryngeal obstruction or asthma?. (external link)
• Anne Kristine Brekka; George Ntoumenopoulos; Ola Drange Røksund et al. (2024). Use of Laryngeal Ultrasound to Observe Laryngeal Movements During Noninvasive Ventilation in Healthy Volunteers. (external link)
• Zoe Fretheim-Kelly; Hege Synnøve Havstad Clemm; Ola Drange Røksund et al. (2023). Translaryngeal Resistance: A Measurement to Assist Decision Making in Upper Airway Pathology. (external link)
• Mariann Bentsen; Trond Markestad; Thomas Halvorsen (2018). Ventilator flow data predict bronchopulmonary dysplasia in extremely premature neonates. (external link)
• Zoe Fretheim-Kelly; Mette Engan; Hege Synnøve Havstad Clemm et al. (2022). Reliability of translaryngeal airway resistance measurements during maximal exercise. (external link)
• Marie Sautter; Thomas Halvorsen; Mette Engan et al. (2020). Electromagnetic inductance plethysmography to study airflow after nebulized saline in bronchiolitis. (external link)
• Tonje Bårdsen; Ola Drange Røksund; Merete Benestad et al. (2022). Tracking of lung function from 10 to 35 years after being born extremely preterm or with extremely low birth weight. (external link)
• Hege Synnøve Havstad Clemm; Ola Drange Røksund; Tiina Maarit Andersen et al. (2022). Exercise-induced Laryngeal Obstruction: Protocol for a Randomized Controlled Treatment Trial. (external link)
• Mette Engan; Merete Salveson Engeseth; Silje Katrine Elgen Fevang et al. (2020). Predicting physical activity in a national cohort of children born extremely preterm. (external link)
• Ola Drange Røksund; John-Helge Heimdal; Jan Olofsson et al. (2014). Larynx during exercise: the unexplored bottleneck of the airways. (external link)
• Lex W. Doyle; Sture Andersson; Andy Bush et al. (2019). Expiratory airflow in late adolescence and early adulthood in individuals born very preterm or with very low birthweight compared with controls born at term or with normal birthweight: a meta-analysis of individual participant data.. (external link)
• Esther Downham; Synnøve Winterthun; Hanne Linda Nakkestad et al. (2008). A novel mitochondrial ND5 (MTND5) gene mutation giving isolated exercise intolerance. (external link)
• Estelle Naumburg; Anders Rane; Thomas Halvorsen et al. (2019). Tardy development of safe medicines for children: a Nordic network offers new platform to reduce this inequity. (external link)
• Karen Galta Sørensen; Knut Asbjørn Alexander Øymar; Grete Jonsson et al. (2023). Are BMI and adipokines associated with asthma, atopy and lung function in young adults previously hospitalized for bronchiolitis?. (external link)
• Magnus Hilland; Ola Drange Røksund; Lorentz Sandvik et al. (2016). Congenital laryngomalacia is related to exerciseinduced laryngeal obstruction in adolescence. (external link)
• Lars Tveiten; Lien My Diep; Thomas Halvorsen et al. (2024). Normal range and risk factors for deviating body temperatures during the first 24 hours in term-born infants under standardised care: an observational study. (external link)

Conference poster

• Aase Johnsen Rogde; Haakon Kristian Kvidaland; Sverre Lehmann et al. (2025). Exercise-induced laryngeal obstruction in a hospital-based cohort with asthma. (external link)
• Tiina Andersen; Anne Kristine Brekka; Zoe Fretheim-Kelly et al. (2024). Upper airway and translaryngeal resistance during mechanical insufflation-exsufflation. (external link)
• Petrine Veierød Solli; Praveen Muralitharan; Sivert H. Veseth et al. (2025). A randomized controlled trial (RCT), adding inspiratory muscle training to standard treatment for exercise-induced laryngeal obstruction (EILO). (external link)
• Mette Engan; Merete Salveson Engeset; Ingvild Øvstebø Engesæter et al. (2020). Prevalence and consequences of left vocal cord paralysis in young adults born extremely premature with a history of neonatal patent ductus arteriosus surgery. (external link)
• Merete Salveson Engeseth; Ola Drange Røksund; Maria Vollsæter et al. (2016). Respiratory morbidity in extremely premature born children and later physical Activity.. (external link)
• Tiina Maarit Andersen; Astrid Sandnes; Anne Kristine Brekka et al. (2015). Hvordan reagerer strupen ved bruk av hostemaskin hos personer med amyotrofisk lateral sklerose?. (external link)
• Maria Vollsæter; Hege Synnøve Havstad Clemm; Einar Thorsen et al. (2014). Alveolar nitric oxide(NO)in children born extremely preterm (EP).. (external link)
• Carolina Campos; Ola Drange Røksund; Maria Vollsæter et al. (2014). Exercise induced inspiratory symptoms. (external link)
• Maria Vollsæter; Hege Synnøve Havstad Clemm; John-Helge Heimdal et al. (2014). Spirometry- a tool for diagnosing exercise induced laryngeal obstruction (EILO)?. (external link)
• Hege Synnøve Havstad Clemm; Maria Vollsæter; Magnus Hilland et al. (2014). Exercise induced laryngeal obstruction(EILO)diagnosed with laryngoscopy during rest or during exercise?. (external link)
• Maria Vollsæter; Hege Synnøve Havstad Clemm; John-Helge Heimdal et al. (2014). Exercise Induced Inspiratory Stridor (EIIS) - A growing Challenge during Physical activity. (external link)
• Hege Synnøve Havstad Clemm; Maria Vollsæter; Ola Drange Røksund et al. (2014). Exercise induced inspiratory stridor (EIIS) in athletes. (external link)
• Astrid Sandnes; Tiina Maarit Andersen; Maria Vollsæter et al. (2015). Lung function and respiratory muscle strength in Amyotrophic Lateral Sclerosis.. (external link)
• Tiina Maarit Andersen; Astrid Sandnes; Maria Vollsæter et al. (2015). Measurement of vital capacity in Amyotrophic Lateral Sclerosis – forced and slowly performed.. (external link)
• Merete Salveson Engeseth; Hege Synnøve Havstad Clemm; Ola Drange Røksund et al. (2015). Better respiratory outcomes for extremely preterm born children.. (external link)
• Tiina Maarit Andersen; Astrid Sandnes; Anne Kristine Brekka et al. (2015). Laryngeal response patterns to mechanical assisted cough in Amyotrophic Lateral Sclerosis.. (external link)
• Tiina Maarit Andersen; Astrid Sandnes; Anne Kristine Brekka et al. (2015). Laryngeal response patterns to mechanical insufflation-exsufflation in amyotrophic lateral sclerosis.. (external link)
• Anne Kristine Brekka; George Ntoumenopoulos; Ola Drange Røksund et al. (2023). Strupens responser under non-invasiv ventilasjonsstøtte hos friske frivillige. (external link)

Conference lecture

• Anne Kristine Brekka; Solfrid Indrekvam; Petrine Veierød Solli et al. (2024). Laryngeal observations during non-invasive ventilation titration in chronic obstructive pulmonary disease. (external link)
• Anne Kristine Brekka; Petrine Veierød Solli; Solfrid Indrekvam et al. (2025). Laryngeal ultrasound to observe laryngeal movements during non-invasive ventilation in COPD. (external link)
• Thomas Halvorsen (2007). Exercise induced Vocal Cord Dysfunction. (external link)
• Thomas Halvorsen (2003). Exercise induced stridor: Visualising the problem. (external link)
• Thomas Halvorsen (2007). Lung sequelae after preterm birth. (external link)
• Merete Salveson Engeseth; Silje Maeland; Maria Vollsæter et al. (2018). Symptoms of vocal cord paresis among children born extremely premature with- or without a PDA ligation.. (external link)
• Thomas Halvorsen (2005). Exercise-induced vocal cord dysfunction. (external link)
• Thomas Halvorsen (2010). Respiratory follow-up of the grown preterm. (external link)
• Ida Jansrud; Lars Peder Vatshelle Bovim; Maria Vollsæter et al. (2018). Is continuous laryngoscopy during cardiopulmonary exercise testing reliable for measuring maximum oxygen uptake?. (external link)
• Thomas Halvorsen (2003). Obstructive pulmonary disease and physical activity in childhood. (external link)
• Thomas Halvorsen (2007). Exercise induced Vocal Cord Dysfunction. (external link)
• Merete Salveson Engeseth; Mette Engan; Hege Synnøve Havstad Clemm et al. (2019). Respiratory- and voice symptoms among extremely preterm born children with prolonged ventilator dependency. A Norwegian national cohort study.. (external link)

Study protocol

• Lars Peder Vatshelle Bovim; Elisabeth Ørskov Rotevatn; Haakon Kristian Kvidaland et al. (2025). Feasibility of a group-based intervention to enhance health-related quality of life and physical activity in children and adolescents with chronic illness: a study protocol. (external link)

Conference abstract (book chapter)

• Monica Holmsve; Hege Synnøve Havstad Clemm; Thomas Halvorsen et al. (2025). From peak performance to post-retirement: Pulmonary changes in elite athletes. (external link)

Professional article

• Ola Drange Røksund; John-Helge Heimdal; Thomas Halvorsen (2016). Anstrengelsesutløst laryngeal obstruksjon - diagnostikk og behandling. (external link)
• H.T. Fitzgerald; Thomas Halvorsen; Mette Engan et al. (2025). Exercise capacity and the psychosocial effect in preterm born infants – Should we do more?. (external link)
• Ola Drange Røksund; Thomas Halvorsen; John-Helge Heimdal (2018). Heterogeniteten ved anstrengelsesutløst laryngeal obstruksjon. (external link)

Conference abstract

• Julie Hestnes; Hedda B Hoel; Ola Drange Røksund et al. (2016). Ventilatory efficiency in children and adolescents born extremely preterm. (external link)
• Thomas Halvorsen; Hege Havstad Clemm; Maria Vollsæter et al. (2020). Conundrums of exercise-related breathing problems. Epiglottic, laryngeal, or bronchial obstruction?. (external link)
• Arne Instebø; Vegard Helgheim; Gottfried Greve et al. (2013). Day To Day Repeatability And Circadian Variation Of Lung Volume Measurements. (external link)

Doctoral thesis (PhD)

• Maria Vollsæter; Thomas Halvorsen (2016). Long-term Respiratory Outcomes of Extreme Preterm Birth. A regional cohort study. (external link)
• Tiina Maarit Andersen; Ola Drange Røksund; Thomas Halvorsen et al. (2018). Laryngeal response patterns during mechanically assisted cough in Amyotrophic Lateral Sclerosis. (external link)
• Zoe Fretheim-Kelly; Eric Strand; Constanze Fintl et al. (2021). From horses to humans : a comparative study developing the first protocol for measuring upper airway pressures in exercising humans. (external link)
• Thomas Halvorsen (2006). Lung sequelae after premature birth. A population based, controlled, long-term cohort study (dissertation). (external link)
• Mariann Bentsen; Thomas Halvorsen; Trond Markestad et al. (2018). Tidal breathing parameters in extremely premature infants. Feasibility and clinical utility of electromagnetic inductance plethysmography. (external link)
• Hege Synnøve Havstad Clemm; Thomas Halvorsen; Trond Markestad et al. (2015). Exercise Capacity after Extremely Preterm birth. PhD Thesis. (external link)
• Hege Synnøve Havstad Clemm; Thomas Halvorsen (2015). Exercise Capacity after extremely preterm birth. Development from childhood to adulthood. (external link)

Letter to the editor

• Karen Galta Sørensen; Knut Asbjørn Alexander Øymar; Thomas Halvorsen et al. (2023). Blood eosinophils during bronchiolitis were not associated with adult asthma in a Norwegian cohort study. (external link)
• Tonje Bårdsen; Ola Drange Røksund; Tomas Mikal Lind Eagan et al. (2023). Impaired Lung Function in Extremely Preterm-Born Adults in Their Fourth Decade of Life. (external link)
• Tiina Maarit Andersen; Astrid Sandnes; Ove Fondenes et al. (2018). Laryngoscopy Can Be a Valuable Tool for Unexpected Therapeutic Response in Noninvasive Respiratory Interventions.. (external link)
• Thomas Halvorsen; O.D. Røksund; John-Helge Heimdal et al. (2011). Larynx in exercising humans; the unexplored bottleneck of the airways (Letter). (external link)
• Knut Øymar; Ingvild Bruun Mikalsen; Torbjørn Nag et al. (2017). Systemiske steroider til førskolebarn med symptomer fra nedre luftveier. (external link)
• Ingvild Bruun Mikalsen; Thomas Halvorsen; Knut Øymar (2013). The optimal management for patients (Letter). (external link)
• Paul Leong; James H. Hull; Peter G. Gibson et al. (2023). Reply. (external link)
• Karen Galta Sørensen; Knut Asbjørn Alexander Øymar; Thomas Halvorsen et al. (2020). Reply to Korppi and Riikonen. (external link)
• Thomas Halvorsen; Ola Drange Røksund; Robert Maat et al. (2011). Use of Post-Exercise Laryngoscopy to Evaluate Exercise Induced Dyspnea (Letter). (external link)

Academic literature review

• Shannon J Simpson; Cassidy Du Berry; Denby J Evans et al. (2023). Unravelling the respiratory health path across the lifespan for survivors of preterm birth. (external link)
• Pernille M. Christensen; John-Helge Heimdal; Kent L. Christopher et al. (2015). ERS/ELS/ACCP 2013 international consensus conference nomenclature on inducible laryngeal obstructions. (external link)
• Merete Salveson Engeseth; Nina Rydland Olsen; Silje Mæland et al. (2017). Left vocal cord paralysis after patent ductus arteriosus ligation: A systematic review. (external link)
• Tiina Maarit Andersen; Brit Hov; Thomas Halvorsen et al. (2021). Upper Airway Assessment and Responses During Mechanically Assisted Cough.. (external link)
• Hege Synnøve Havstad Clemm; Merete Salveson Engeseth; Maria Vollsæter et al. (2018). Bronchial hyper-responsiveness after preterm birth. (external link)
• Hege Synnøve Havstad Clemm; J Tod Olin; Cameron McIntosh et al. (2022). Exercise-induced laryngeal obstruction (EILO) in athletes: a narrative review by a subgroup of the IOC Consensus on 'acute respiratory illness in the athlete'. (external link)
• Maria Vollsæter; Trine Stensrud; Robert Maat et al. (2022). Exercise related respiratory problems in the young—Is it exercise-induced bronchoconstriction or laryngeal obstruction?. (external link)
• Merete Salveson Engeseth; Nina Rydland Olsen; Ola Drange Røksund et al. (2016). A systematic review and meta-analysis: Prevalence and consequences of left recurrent laryngeal nerve paresis following surgical ligation of patent ductus arteriosus in extremely premature infants. PROSPERO 2016:CRD42016029921 Available from http://www.crd.york.ac.uk/PROSPERO_REBRANDING/display_record.asp?ID=CRD42016029921. (external link)
• Christoph Male; Antje Neubert; Helene Hartvedt Grytli et al. (2022). Evidence-based off-label use of drugs for children and adolescents: International consortium of pediatric formularies providing the best-available evidence. (external link)
• Kaia Skromme; Katrine Tyborg Leversen; Geir Egil Eide et al. (2015). Respiratory illness contributed significantly to morbidity in children born extremely premature or with extremely low birthweights in 1999-2000. (external link)
• Knut Øymar; Thomas Halvorsen (2009). Emergency presentation and management of acute severe asthma in children. (external link)
• Zoe Louise Fretheim-Kelly; Thomas Halvorsen; Hege Synnøve Havstad Clemm et al. (2019). Exercise induced laryngeal obstructions in humans and equines. A comparative review. (external link)
• John-Helge Heimdal; Thomas Halvorsen; Robert Maat et al. (2011). Exercise Induced Laryngeal Obstruction (EILO): Diagnosis and Management. (external link)
• Ola Drange Røksund; James Tod Olin; Thomas Halvorsen (2018). Working towards a common transatlantic approach for evaluation of exercise-induced laryngeal obstruction. (external link)

Editorial/Leader article

• Thomas Halvorsen (2018). Our tiny preemies: What will become of their future pulmonary health?. (external link)
• Thomas Halvorsen (2024). Ambient Air Pollution and Morbidities in Bronchopulmonary Dysplasia; It’s All about the Money. (external link)

Media interview

• Thomas Halvorsen; Camilla Tøndel (2014). Forskning på legemidler til barn må gjøres i Norge. (external link)

See a complete overview of publications in NVA.

Updated list of publications on PubMed, please click the link below:

https://www.ncbi.nlm.nih.gov/myncbi/16uVRzeeBPOkH/bibliography/public/