Academic literature review
Academic article
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Bjørn Barstad; Dag Tveitnes; Ingvild Dalen
et al. (2019). The B-lymphocyte chemokine CXCL13 in the cerebrospinal fluid of children with Lyme neuroborreliosis: associations with clinical and laboratory variables. (external link)
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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)
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Knut Øymar; Jakob Havnen; Thomas Halvorsen
et al. (2001). Eosinophil counts and urinary eosinophil protein X in children hospitalize for wheezing during the first year of life: prediction of recurrent wheezing. (external link)
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David Hugo Engelsvold; Knut Øymar
(2003). Hospital admissions for childhood asthma in Rogaland, Norway from 1984 to 2000. (external link)
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Kristine Kjer Byberg; Ingvild Bruun Mikalsen; Geir Egil Eide
et al. (2018). The associations between weight-related anthropometrics during childhood and lung function in late childhood: A retrospective cohort study. (external link)
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Dag Tveitnes; Knut Øymar; Olav B. Natås
(2009). Laboratory data in children with Lyme neuroborreliosis, relation to clinical presentation and duration of symptoms. (external link)
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Inge Hagen; Knut Øymar
(2009). Pharmacological differences between once daily and twice daily gentamicin dosage in newborns with suspected sepsis. (external link)
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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)
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Knut Øymar; Robert Bjerknes
(2000). Urinary eosinophil protein X in children with atopic dermatitis: relation to atopy and disease activity. (external link)
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Knut Øymar; Robert Bjerknes
(1998). Differential patterns of circulating adhesion molecules in children with bronchial asthma, and acute bronchiolitis. (external link)
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Kristine Kjer Byberg; Bjørn Edvin Øglænd; Geir Egil Eide
et al. (2014). Birth after preeclamptic pregnancies: Association with allergic sensitization and allergic rhinoconjunctivitis in late childhood; a historically matched cohort study. (external link)
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Ingvild Bruun Mikalsen; Damoun Nassehi; Knut Øymar
(2018). Vortex whistle and smart phone application for peak flow recordings in asthmatic children: A feasibility study. (external link)
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Knut Øymar; Ingvild Bruun Mikalsen; Kari Furu
et al. (2015). Prescription patterns of inhaled corticosteroids for preschool children - A Norwegian register study. (external link)
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Knut Øymar; Dag Tveitnes
(2008). Økt forekomst av nevroborreliose hos barn. (external link)
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Lise Reindal; Knut Øymar
(2006). Hospital admissions for wheezing and asthma in childhood - are they avoidable?. (external link)
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Ingvild Bruun Mikalsen; Kristine Kjer Byberg; Michele R. Forman
et al. (2020). Adipokines in adolescence; the associations with lung function and atopy – A cross-sectional study. (external link)
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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)
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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)
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Peder Aleksander Bjorland; Hege Langli Ersdal; Joar Eilevstjønn
et al. (2020). Changes in heart rate from 5 s to 5 min after birth in vaginally delivered term newborns with delayed cord clamping. (external link)
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Knut Øymar; Robert Bjerknes
(2001). Urinary eosinophil protein X in children with asthma: influence of atopy and airway infections. (external link)
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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)
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Ingvild Bruun Mikalsen; Thomas Halvorsen; Knut Øymar
(2012). The outcome after severe bronchiolitis is related to gender and virus. (external link)
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B Ellingsen; S Ase; Knut Øymar
(2003). Forebygging av respiratorisk syncytalvirus-infeksjoner med pailvizumlab. (external link)
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Ingvild Bruun Mikalsen; Thomas Halvorsen; Geir Egil Eide
et al. (2013). Severe bronchiolitis in infancy: Can asthma in adolescence be predicted?. (external link)
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Alet Jenny Røsvik; Knut Øymar; Jan Terje Kvaløy
et al. (2009). Oxygen saturation in healthy newborns; influence of birth weight and mode of delivery. (external link)
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Trine Haug Popperud; Marion Boldingh; Cathrine Brunborg
et al. (2017). Juvenile myasthenia gravis in Norway: A nationwide epidemiological study. (external link)
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Knut Øymar; Ingvild Bruun Mikalsen; Suzanne Crowley
(2017). Protrahert bakteriell bronkitt hos barn. (external link)
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Knut Øymar; Åge Lærdal; Robert Bjerknes
(2000). Soluble CD30 and CD23 in cord blood are not related to atopy in early childhood. (external link)
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Thomas Halvorsen; Brit Skadberg; Geir Egil Eide
et al. (2005). Characteristics of asthma and airway hyper-responsiveness after premature birth. (external link)
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Jostein Andersen Førsvoll; Knut Øymar
(2018). The role of tonsillectomy in the Periodic Fever, Aphthous stomatitis, Pharyngitis and cervical Adenitis syndrome; A literature review. (external link)
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Ingvild Bruun Mikalsen; Liliane Merete Skeiseid; Line Merete Tveit
et al. (2015). Decline in admissions for childhood asthma, a 26-year period population-based study. (external link)
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Knut Øymar; Atle Røsvik; Jan Fossheim
et al. (2007). Regelmessige episoder med høy feber hos en liten gutt. (external link)
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Jostein Andersen Førsvoll; Emilius Adrianus Maria Janssen; Ingegerd Møller
et al. (2015). Reduced number of CD8+ cells in tonsillar germinal centres in children with the periodic fever, aphthous stomatitis, pharyngitis and cervical adenitis syndrome. (external link)
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Knut Øymar; Said Elsayed; Robert Bjerknes
(1997). Serum eosinophil cationic protein and interleukin-5 in childeren with bronchial asthma and acute bronchiolitis. (external link)
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Bjørn Barstad; Dag Tveitnes; Sølvi Noraas
et al. (2017). Cerebrospinal Fluid B-lymphocyte Chemoattractant CXCL13
in the Diagnosis of Acute Lyme Neuroborreliosis in Children. (external link)
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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)
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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)
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Alan Martin Edwards; Dalia Bibawy; Sharon Matthews
et al. (2015). Long-term use of a 4% sodium cromoglicate cutaneous emulsion in the treatment of moderate to severe atopic dermatitis in children. (external link)
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Peder Aleksander Bjorland; Hege Langli Ersdal; Joanna Clare Haynes
et al. (2021). Tidal volumes and pressures delivered by the
NeoPuff T-piece resuscitator during resuscitation
of term newborns. (external link)
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David Hugo Engelsvold; Knut Øymar
(2003). Innleggelser for akutt astme hos barn. (external link)
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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)
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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)
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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)
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Dag Tveitnes; Olav Bjarte Natås; Øyvind Skadberg
et al. (2012). Lyme meningitis, the major cause of childhood meningitis in an endemic area: a population based study. (external link)
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Anlaug Vatne; Claus Klingenberg; Knut Øymar
et al. (2020). Reduced antibiotic exposure by serial physical examinations in term neonates at risk of early-onset sepsis. (external link)
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Knut Øymar; Lage Aksnes
(2005). Increased levels of urinary leukotriene E4 in children with severe eczema/dermatitis syndrome. (external link)
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Zuzana Huncikova; Anlaug Vatne; Hans Jørgen Stensvold
et al. (2023). Late-onset sepsis in very preterm infants in Norway in 2009-2018: A population-based study. (external link)
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Siren Rettedal; Iren Høyland Löhr; Olav Bjarte Natås
et al. (2013). Risk factors for acquisition of CTX-M-15 extended-spectrum beta-lactamase-producing Klebsiella pneumoniae during an outbreak in a neonatal intensive care unit in Norway. (external link)
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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)
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Jørgen Erland Linde; Jörn Schulz; Jeffrey M. Perlman
et al. (2017). The relation between given volume and heart rate during newborn resuscitation. (external link)
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Jørgen Erland Linde; Joar Eilevstjønn; Knut Øymar
et al. (2017). Feasibility of a prototype newborn resuscitation monitor to study transition at birth, measuring heart rate and ventilator parameters, an animal experimental study. (external link)
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Knut Øymar; Kjersti Bårdsen
(2014). Continuous positive airway pressure for bronchiolitis in a general paediatric ward; a feasibility study. (external link)
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Siren Rettedal; Iren Høyland Löhr; Eva Bernhoff
et al. (2015). Extended-spectrum β-lactamase-producing Enterobacteriaceae among pregnant women in Norway: Prevalence and maternal-neonatal transmission. (external link)
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Jørgen Erland Linde; Jeffrey M. Perlman; Knut Øymar
et al. (2018). Predictors of 24-h outcome in newborns in need of positive pressure ventilation at birth. (external link)
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Sofie Helen Vaula; Knut Asbjørn Alexander Øymar; Vegard Hovland
et al. (2024). Trakeobronkomalasi hos barn. (external link)
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Knut Øymar; Lage Aksnes
(2004). Urinary 9 alpha,11 beta-prostaglandin F-2 in children with atopic eczema/dermatitis syndrome: An indicator of mast cell activation?. (external link)
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Antje Aarthun; Knut Øymar; Kristin Akerjordet
(2019). Parental involvement in decision-making about their child's health care at the hospital. (external link)
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Bjørn Barstad; Hanne Quarsten; Dag Tveitnes
et al. (2018). Direct molecular detection and genotyping of borrelia burgdorferi sensu lato in cerebrospinal fluid of children with lyme neuroborreliosis. (external link)
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Bjørn Barstad; Anna J. Henningsson; Dag Tveitnes
et al. (2020). Cerebrospinal fluid cytokines and chemokines in children with Lyme neuroborreliosis; pattern and diagnostic utility. (external link)
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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)
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Kristine Byberg; Knut Øymar; Lage Aksnes
(2008). Fatty acids in cord blood plasma, the relation to soluble CD23 and subsequent atopy. (external link)
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Jostein Andersen Førsvoll; Einar Klæboe Kristoffersen; Knut Øymar
(2013). Elevated levels of CXCL10 in the Periodic Fever, Aphthous stomatitis, Pharyngitis and cervical Adenitis syndrome (PFAPA) during and between febrile episodes; an indication of a persistent activation of the innate immune system. (external link)
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Antje Aarthun; Knut Øymar; Kristin Akerjordet
(2019). Health professionals’ involvement of parents in decision-making in interprofessional practice at the hospital. (external link)
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Knut Øymar; Dag Tveitnes
(2009). Clinical characteristics of childhood Lyme neuroborreliosis in an endemic area of northern Europe. (external link)
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Atle Røsvik; Knut Øymar; Jan Terje Kvaløy
et al. (2009). Oxygen saturation in healthy newborns; influence of birth weight and mode of delivery. (external link)
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Jostein A. Førsvoll; Knut Øymar
(2007). C-reactive protein in the periodic fever, aphthous stomatitis, pharyngitis and cervical adenitis (PFAPA) syndrome. (external link)
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Kristine Kjer Byberg; Knut Øymar; Geir Egil Eide
et al. (2017). Exposure to preeclampsia in utero affects growth from birth to late childhood dependent on child's sex and severity of exposure: Follow-up of a nested case-control study. (external link)
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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)
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Peder Aleksander Bjorland; Hege Langli Ersdal; Knut Øymar
et al. (2020). Compliance with Guidelines and Efficacy of Heart Rate Monitoring during Newborn Resuscitation: A Prospective Video Study. (external link)
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Dag Tveitnes; Knut Øymar; Olav B. Natås
(2007). Acute facial nerve palsy in children: How often is it Lyme borreliosis?. (external link)
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Jørgen Erland Linde; Jörn Schulz; Jeffrey M. Perlman
et al. (2016). Normal newborn heart rate in the first five minutes of life assessed by dry-electrode electrocardiography. (external link)
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Amélie E. Bigorgne; Henner F. Farin; Roxane Lemoine
et al. (2014). TTC7A mutations disrupt intestinal epithelial apicobasal polarity. (external link)
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Ingvild Bruun Mikalsen; Øystein Karlstad; Kari Furu
et al. (2018). Forskrivning av legemidler mot astma til barn i perioden 2004–15. (external link)
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Antje Aarthun; Knut Øymar; Kristin Akerjordet
(2017). How health professionals facilitate parents' involvement in decision-making at the hospital: A parental perspective. (external link)
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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)
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Emilie Raaum Closs; Miriam Lyamouri; Knut Asbjørn Alexander Øymar
et al. (2023). Regionale forskjeller i bruk av protonpumpehemmere hos barn. (external link)
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Maren Våland Øymar; Joel Pradeepkumar Selvakumar; Ingvild Dalen
et al. (2025). Regional Differences and Time Trends in the Treatment of Infants Hospitalised With Bronchiolitis in Norway. (external link)
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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)
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Siren Rettedal; Iren Høyland Löhr; Olav Bjarte Natås
et al. (2012). First outbreak of extended-spectrum beta-lactamase-producing Klebsiella pneumoniae in a Norwegian neonatal intensive care unit; associated with contaminated breast milk and resolved by strict cohorting. (external link)
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Peder Aleksander Bjorland; Knut Øymar; Hege Langli Ersdal
et al. (2019). Incidence of newborn resuscitative interventions at birth and short-term outcomes: A regional population-based study. (external link)
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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)
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Dag Tveitnes; Knut Øymar
(2015). Gender differences in childhood lyme neuroborreliosis. (external link)
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Knut Øymar
(2007). Allergivaksinasjon i Norge. (external link)
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Knut Øymar; Einar Klæboe Kristoffersen
(2007). Periodisk feber-syndrom hos barn. (external link)
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Anlaug Vatne; Claus Klingenberg; Siren Rettedal
et al. (2021). Early-Onset Sepsis in Neonates - A Population-Based Study in South-West Norway From 1996 to 2018. (external link)
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Kristine Kjer Byberg; Geir Egil Eide; Michele R. Forman
et al. (2016). Body mass index and physical activity in early childhood are associated with atopic sensitization, atopic dermatitis and asthma in later childhood. (external link)
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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)
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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)
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Knut Øymar; Lage Aksnes
(2005). Increased levels of urinary leukotriene E4 in children with severe atopic eczema/dermatitis syndrome. (external link)
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Knut Øymar; Gjermund Fluge; Karen Rosendahl
(1993). Residiverende abdominalsmerter. En prospektiv undersøkelse. (external link)
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M. Aurivillius; Knut Øymar; V-A Oxelius
(2005). Immunoglobulin heavy G2 chain (IGHG2) gene restriction in the development of severe respiratory syncytial virus infection. (external link)
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Knut Øymar; Robert Bjerknes
(1998). Is serum eosinophil cationic protein in bronchiolitis a predictor of asthma?. (external link)
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Karen Galta Sørensen; Ingvild Bruun Mikalsen; Axel Cornelis Neven
et al. (2020). Half of children with recurrent or chronic wet cough before three years of age were symptom-free by age seven. (external link)
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Iren Høyland Löhr; Siren Rettedal; Olav Bjarte Natås
et al. (2013). Long-term faecal carriage in infants and intra-household transmission of CTX-M-15-producing Klebsiella pneumoniae following a nosocomial outbreak. (external link)
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Jostein Andersen Førsvoll; Einar Klæboe Kristoffersen; Knut Øymar
(2013). Incidence, clinical characteristics and outcome in Norwegian children with periodic fever, aphthous stomatitis, pharyngitis and cervical adenitis syndrome; a population-based study. (external link)
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Zuzana Huncikova; Hans Jørgen Stensvold; Knut Asbjørn Alexander Øymar
et al. (2023). Variation in antibiotic consumption in very preterm infants-a 10 year population-based study. (external link)
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Ingvild Bruun Mikalsen; Ingvild Dalen; Øystein Karlstad
et al. (2019). Airway symptoms and atopy in young children prescribed asthma medications: A large‐scale cohort study. (external link)
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Ann Marit Gilje; Per Kristian Knudsen; Knut Øymar
(2011). Ei ung jente med magesmerter. (external link)
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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)
Letter to the editor
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Conference lecture
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