Cristin

2023
1.	Sommerfelt, Kristian; Schei, Trude; Angelsen, Arild. Severe and Very Severe Myalgic Encephalopathy/Chronic Fatigue Syndrome ME/CFS in Norway: Symptom Burden and Access to Care. Journal of Clinical Medicine 2023 ;Volum 12.(4) s. - HAUKELAND NMBU Untitled
2021
2.	Hoel, Fredrik; Hoel, August; Pettersen, Ina Katrine Nitschke; Rekeland, Ingrid Gurvin; Risa, Kristin; Alme, Kine; Sørland, Kari; Fosså, Alexander; Lien, Katarina; Herder, Ingrid; Thurmer, Hanne; Gotaas, Merethe Otelie Eide; Schäfer, Christoph; Berge, Rolf K.; Sommerfelt, Kristian; Marti, Hans Peter; Dahl, Olav; Mella, Olav; Fluge, Øystein; Tronstad, Karl Johan. A map of metabolic phenotypes in patients with myalgic encephalomyelitis/chronic fatigue syndrome. JCI Insight 2021 ;Volum 6:e149217.(16) s. 1-19 STO UNN UiB OUS STHF HAUKELAND UiO Untitled
2019
3.	Fevang, Silje Katrine Elgen; Hysing, Mari; Sommerfelt, Kristian; Markestad, Trond; Elgen, Irene Bircow. Development and predictors of childhood mental health problems in former extremely preterm infants. Early Human Development 2019 ;Volum 135. s. 44-49 HAUKELAND UiB NORCE SI Untitled
2017
4.	Fevang, Silje Katrine Elgen; Hysing, Mari; Sommerfelt, Kristian; Elgen, Irene Bircow. Mental health assessed by the Strengths and Difficulties Questionnaire for children born extremely preterm without severe disabilities at 11 years of age: a Norwegian, national population-based study. European Child and Adolescent Psychiatry 2017 s. 1-9 NORCE UiB HAUKELAND Untitled

5.	Tronstad, Karl Johan; Fluge, Øystein; Lien, Katarina; Sommerfelt, Kristian; Mella, Olav. Mer om pyruvat dehydrogenase og kronisk utmattelsessyndrom.. Tidsskrift for Den norske legeforening 2017 UiO UiB Untitled
2016
6.	Eger, Siw Helen. Significance of intrauterine growth, and abnormal fetal blood flow for neonatal and long term outcome in preterm infants. : University of Bergen 2016 (ISBN 978-82-308-3375-9) UiB Untitled

7.	Fevang, Silje Katrine Elgen; Hysing, Mari; Markestad, Trond; Sommerfelt, Kristian. Mental Health in Children Born Extremely Preterm Without Severe Neurodevelopmental Disabilities. Pediatrics 2016 ;Volum 137.(4) NORCE HAUKELAND UiB Untitled

8.	Fevang, Silje Katrine Elgen. Mental health among children born extremely preterm or with extremely low birth weight at preschool- and school age. A national population based study. : Universitetet i Bergen 2016 (ISBN 978-82-308-3259-2) NORCE UiB Untitled

9.	Fluge, Øystein; Mella, Olav; Bruland, Ove; Risa, Kristin; Dyrstad, Sissel Elisabeth; Alme, Kine; Rekeland, Ingrid Gurvin; Sapkota, Dipak; Røsland, Gro Vatne; Fosså, Alexander; Ktoridou-Valen, Irini; Lunde, Sigrid; Sørland, Kari; Lien, Katarina; Herder, Ingrid; Thurmer, Hanne; Gotaas, Merete E; Baranowska, Katarzyna Anna; Bohnen, Louis M.L.J.; Schäfer, Christoph; Mccann, Adrian; Sommerfelt, Kristian; Helgeland, Lars; Ueland, Per Magne; Dahl, Olav; Tronstad, Karl Johan. Metabolic profiling indicates impaired pyruvate dehydrogenase function in myalgic encephalopathy/chronic fatigue syndrome.. JCI Insight 2016 ;Volum 1.(21) UiT UiO HAUKELAND STHF OUS UiB Untitled
2015
10.	Eger, Siw Helen; Kessler, Jørg; Kiserud, Torvid; Markestad, Trond; Sommerfelt, Kristian. Foetal Doppler abnormality is associated with increased risk of sepsis and necrotising enterocolitis in preterm infants. Acta Paediatrica 2015 ;Volum 104.(4) s. 368-376 HAUKELAND UiB Untitled

11.	Fevang, Silje Katrine Elgen; Sommerfelt, Kristian; Leversen, Katrine Tyborg; Markestad, Trond. Minor neurodevelopmental impairments are associated with increased occurrence of ADHD symptoms in children born extremely preterm. European Child and Adolescent Psychiatry 2015 ;Volum 24.(4) s. 463-470 UiB HAUKELAND Untitled
2014
12.	Stovner, Lars Jacob; Sommerfelt, Kristian; Russell, Michael Bjørn. Hodepine. I: Nevrologi og nevrokirurgi fra barn til voksen, 6.utgave. Forlaget Vett & Viten AS 2014 ISBN 978-82-412-0709-9. s. 389-401 NTNU UiB UiO Untitled
2013
13.	Eger, Siw Helen; Sommerfelt, Kristian; Kiserud, Torvid; Markestad, Trond. Foetal umbilical artery Doppler in small preterms: (IQ) Neurocognitive outcome at 5 years of age. Acta Paediatrica 2013 ;Volum 102.(4) s. 403-409 UiB HAUKELAND Untitled
2012
14.	Leversen, Katrine Tyborg; Sommerfelt, Kristian; Elgen, Irene Bircow; Eide, Geir Egil; Irgens, Lorentz M.; Juliusson, Petur Benedikt; Markestad, Trond. Prediction of outcome at 5 years from assessments at 2 years among extremely preterm children: A Norwegian national cohort study. Acta Paediatrica 2012 ;Volum 101.(3) s. 264-270 FHI HAUKELAND UiB Untitled
2011
15.	Leversen, Katrine Tyborg; Sommerfelt, Kristian; Rønnestad, Arild Erlend; Kaaresen, Per Ivar; Farstad, Teresa; Skranes, Janne Helen; Støen, Ragnhild; Elgen, Irene Bircow; Rettedal, Siren; Eide, Geir Egil; Irgens, Lorentz M.; Markestad, Trond. Prediction of Neurodevelopmental and Sensory Outcome at 5 Years in Norwegian Children Born Extremely Preterm. Pediatrics 2011 ;Volum 127.(3) s. E630-E638 HAUKELAND STO SUS FHI UiB UNN OUS AHUS Untitled
2010
16.	Leversen, Katrine Tyborg; Sommerfelt, Kristian; Rønnestad, Arild Erlend; Kaaresen, Per Ivar; Farstad, Teresa; Skranes, Janne Helen; Støen, Ragnhild; Elgen, Irene Bircow; Rettedal, Siren; Eide, Geir Egil; Irgens, Lorentz M.; Markestad, Trond. Predicting neurosensory disabilities at two years of age in a national cohort of extremely premature infants. Early Human Development 2010 ;Volum 86.(9) s. 581-586 UiB FHI UNN STO HAUKELAND SUS AHUS OUS Untitled

17.	Odberg, Morten Duus; Sommerfelt, Kristian; Markestad, Trond; Elgen, Irene Bircow. Growth and somatic health until adulthood of low birthweight children. Archives of Disease in Childhood: Fetal and Neonatal Edition 2010 ;Volum 95.(3) s. F201-F205 UiB HAUKELAND Untitled

18.	Stovner, Lars Jacob; Sommerfelt, Kristian. Hodepine. I: Nevrologi og nevrokirurgi. Fra barn til voksen. 5.utgave. Høvik: Forlaget Vett & Viten 2010 ISBN 978-82-412-0686-3. s. 399-411 NTNU UiB Untitled
2009
19.	Leversen, KT; Sommerfelt, K; Irgens, Lorentz M; Markestad, T. Cognitive outcome at 5 years of age in a national cohort of extremely pre-term infants. Acta Paediatrica 2009 ;Volum 98. Suppl. 460 s. S178- FHI UiB HAUKELAND UiO Untitled

20.	Leversen, KT; Sommerfelt, K; Irgens, Lorentz M; Markestad, T. Relationship between cognitive and motor function at 5 years of age in a national cohort of extremely preterm infants. Acta Paediatrica 2009 ;Volum 98. Suppl. S460 s. S178-S179 FHI UiB HAUKELAND Untitled

21.	Markestad, Trond; Sommerfelt, Kristian. Nervesystemet og musklene. I: Klinisk Pediatri. Fagbokforlaget 2009 ISBN 978-82-450-0745-9. s. 263-289 UiB Untitled

22.	Markestad, Trond; Sommerfelt, Kristian. Psykomotorisk utvikling. I: Klinisk Pediatri. Fagbokforlaget 2009 ISBN 978-82-450-0745-9. s. 27-37 UiB Untitled

23.	Odberg, Morten Duus; Sommerfelt, Kristian; Markestad, Trond; Elgen, Irene Bircow. GROWTH AND SOMATIC HEALTH UNTIL ADULTHOOD OF LOW BIRTH WEIGHT CHILDREN. Acta Paediatrica 2009 ;Volum 98. s. 201-201 UiB Untitled

24.	Wold, Siw-Helen Westby; Sommerfelt, Kristian; Reigstad, Hallvard; Rønnestad, Arild; Medbø, Sverre; Farstad, Teresa; Kaaresen, Per Ivar; Støen, Ragnhild; Leversen, Katrine Tyborg; Irgens, Lorentz M.; Markestad, Trond. Neonatal mortality and morbidity in extremely preterm small for gestational age infants: a population based study. Archives of Disease in Childhood: Fetal and Neonatal Edition 2009 ;Volum 94.(5) s. F363-F367 UiB FHI STO HAUKELAND OUS AHUS UNN Untitled
2008
25.	Høie, B; Sommerfelt, K; Waaler, PE; Alsaker, FD; Skeidsvoll, H; Mykletun, Arnstein. The combined burden of cognitive, executive function, and psychosocial problems in children with epilepsy: a population-based study. Developmental Medicine & Child Neurology 2008 ;Volum 50.(7) s. 530-536 FHI HAUKELAND UiB Untitled
2006
26.	Høie, Bjørg; Mykletun, Arnstein; Waaler, Per Erik; Skeidsvoll, Håvard; Sommerfelt, Kristian. Executive functions and seizure-related factors in children with epilepsy in western Norway. Developmental Medicine & Child Neurology 2006 ;Volum 48.(6) s. 519-525 UiB HAUKELAND Untitled

27.	Høie, Bjørg; Sommerfelt, Kristian; Waaler, Per-Erik; Alsaker, Francoise Delange; Skeidsvoll, Håvard; Mykletun, Arnstein. Psychosocial problems and seizure-related factors in children with epilepsy. Developmental Medicine & Child Neurology 2006 ;Volum 48.(3) s. 213-219 UiB HAUKELAND Untitled

28.	Kashala, Esperance; Lundervold, Astri Johansen; Sommerfelt, Kristian; Tylleskär, Thorkild; Elgen, Irene Bircow. Co-existing symptoms and risk factors among African school children with hyperactivity-inattention symptoms in Kinshasa, Congo. European Child and Adolescent Psychiatry 2006 ;Volum 15.(5) s. 292-299 UiB HAUKELAND Untitled

29.	Versland, Lene Brose; Sommerfelt, Kristian; Elgen, Irene Bircow. Maternal signs of chorioamnionitis: Persistent cognitive impairment in low-birthweight children. Acta Paediatrica 2006 ;Volum 95.(2) s. 231-235 UiB HAUKELAND Untitled
2005
30.	Elgen, Irene Bircow; Johansson, Kjell Arne; Markestad, Trond; Sommerfelt, Kristian. A non-handicapped cohort of low-birthweight children: growth and general health status at 11 years of age. Acta Paediatrica 2005 ;Volum 94.(9) s. 1203-1207 UiB Untitled

31.	Enger, Per Ø.; Svendsen, Frode; Sommerfelt, Kristian; Wester, Knut. Shunt revisions in children - can they be avoided? Experiences from a population-based study. Pediatric Neurosurgery 2005 ;Volum 41.(6) s. 300-304 UiB HAUKELAND Untitled

32.	Høie, Bjørg; Mykletun, Arnstein; Sommerfelt, Kristian; Bjørnæs, H; Skeidsvoll, H; Waaler, PE. Seizure-related factors and non-verbal intelligence in children with epilepsy - A population-based study from Western Norway. Seizure 2005 ;Volum 14.(4) s. 223-231 UiB HAUKELAND OUS Untitled

33.	Kashala, Esperance; Elgen, Irene Bircow; Sommerfelt, Kristian; Tylleskär, Thorkild. Teacher ratings of mental health among school children in Kinshasa, Democratic Republic of Congo. European Child and Adolescent Psychiatry 2005 ;Volum 14.(4) s. 208-215 UiB HAUKELAND Untitled

34.	Kashala, Espérance; Elgen, Irene Bircow; Sommerfelt, Kristian; Tylleskär, Thorkild; Lundervold, Astri Johansen. Cognition in African children with attention-deficit hyperactivity disorder. Pediatric Neurology 2005 ;Volum 33.(5) s. 357-364 UiB HAUKELAND Untitled

35.	Kashala, Esperance; Tylleskär, Thorkild; Elgen, Irene Bircow; Kayembe, KT; Sommerfelt, Kristian. Attention deficit and hyperactivity disorder among school children in Kinshasa, Democratic Republic of Congo. African Health Sciences 2005 ;Volum 5.(3) s. 172-181 UiB HAUKELAND Untitled
2004
36.	Elgen, Irene Bircow; Lundervold, Astri Johansen; Sommerfelt, Kristian. Aspects of inattention in low birth weight children. Pediatric Neurology 2004 ;Volum 30.(2) s. 92-98 UiB Untitled

37.	Kashala, E; Elgen, Irene Bircow; Sommerfelt, Kristian; Tylleskär, Thorkild. Neuropsychiatric symptoms among African school children in Kinshasa. European psychiatry 2004 ;Volum 19. s. 235S-235S UiB Untitled

38.	Waaler, Per Erik; Sommerfelt, Kristian. Barnenevrologi og habilitering i Norge. Tidsskrift for Den norske legeforening 2004 (Årg. 124, nr 19) s. 2486-2487- UiB Untitled
2003
39.	Elgen, Irene Bircow; Ellertsen, Bjørn; Sommerfelt, Kristian. Cognitive performance in a low birthweight cohort at 5 and 11 years of age. Pediatric Neurology 2003 ;Volum 29. s. 111-116 UiB Untitled

40.	Wold, H; Sommerfelt, Kristian; Kiserud, Torvid; Reigstad, Hallvard. Fostersirkulasjon og hjernevekst hos premature. XVII Nordiske perinatal congress; 2003-06-01 UiB Untitled
2002
41.	Aase, Lene Jeanette Grasmo; Sommerfelt, Kristian; Berstad, Tove. Appendikostomi for fekalinkontinens hos barn og unge med myelomeningocele. Tidsskrift for Den norske legeforening 2002 ;Volum 122.(28) s. 2696-2699 UiB Untitled

42.	Elgen, Irene Bircow; Sommerfelt, Kristian. Low birthweight children: coping in school?. Acta Paediatrica 2002 ;Volum 91. s. 939-945 UiB Untitled

43.	Elgen, Irene Bircow; Sommerfelt, Kristian; Markestad, Trond. Population based, controlled study of behavioural problems and psychiatric disorders in low birthweight children at 11 years of age. Archives of Disease in Childhood: Fetal and Neonatal Edition 2002 ;Volum 87. s. F128-F132 UiB Untitled

44.	Sommerfelt, Kristian. Intrauterin veksthemming- langtidsutsikter- en populasjonsbasert, kontrollert oppfølgingsstudie. Perinataldagen; 2002-01-01 UiB Untitled

45.	Sommerfelt, Kristian. Problemer med læring og adferd. "Heite emner" i nyfødtmedisin.; 2002-01-01 UiB Untitled

46.	Sommerfelt, Kristian. Utvikling. I: Håndbok for helsestasjoner 0-5 år. Oslo: Kommuneforlaget 2002 ISBN 82-446-0885-4. s. 128-136 UiB Untitled

47.	Sommerfelt, Kristian. Utvikling hos barn - vær romslig i din vurdering. Landskonferense for helsesøstre og leger- kompetense,innsikt og profesjonalitet. Faglig forum for helse og sosialtjenesten.; 2002-01-01 UiB Untitled

48.	Sommerfelt, Kristian. Vekst og utvikling. I: Håndbok for helsestasjoner 0-5 år. Oslo: Kommuneforlaget 2002 ISBN 82-446-0885-4. s. 128-136 UiB Untitled

49.	Sommerfelt, Kristian; Sonnander, K; Skranes, Jon; Andersson, Helle Wessel; Ahlsten, Gunnar; Ellertsen, B; Markestad, Trond; Jacobsen, Geir Wenberg; Hoffman, H.J.; Bakketeig, L. Neuropsychologic and motor function in small-for-gestational preschoolers. Pediatric Neurology 2002 ;Volum 26.(3) s. 186- NTNU UiB Untitled

50.	Sommerfelt, Kristian; Sonnander, Karin; Skranes, Jon; Andersson, Helle W; Ahlsten, Gunnar; Bjørn, Ellertsen; Markestad, Trond; Jacobsen, Geir; Hoffman, Howard; Bakketeig, Leif. Neuropsychological and motor function in small for gestational age preschoolers. Pediatric Neurology 2002 ;Volum 26.(126) s. 186-191 UiB Untitled

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