List of papers, papers I-III are removed from the thesis due to copyright restrictions.
Paper I Vikanes A, Grjibovski AM, Vangen S, Magnus P Variations in prevalence of hyperemesis gravidarum by country of birth: A study of 900,074 pregnancies in Norway, 1967-2005 Scandinavian Journal of Public Health 2008; 36:135-42 DOI: 10.1177/1403494807085189
Paper II Vikanes A, Grjibovski AM, Vangen S, Magnus P Length of residence and risk of developing hyperemesis gravidarum among first generation immigrants to Norway European Journal of Public Health 2008; 18:460-5 DOI: 10.1093/eurpub/ckn051
Paper III Grjibovski AM, Vikanes A, Stoltenberg C, Magnus P Consanguinity and the risk of hyperemesis gravidarum in Norway Acta Obstetrica et Gynecologica Scandinavica 2008; 87:20-5 DOI: 10.1080/00016340701709273
Paper IV Vikanes A, Grjibovski AM, Vangen S, Gunnes N, Samuelsen SO, Magnus P Maternal body composition, smoking and hyperemesis gravidarum Submitted to American Journal of Obstetrics and Gynecology, November 10th 2009 Published Annals of Epidemiology 2010; 20:592–598 DOI: 10.1016/j.annepidem.2010.05.009
Paper V Vikanes A, Skjærven RS, Grjibovski AM, Gunnes N, Magnus P The recurrence of hyperemesis gravidarum across generations Submitted to British Medical Journal, November 9th 2009 Published BMJ 2010;340:c2050. Copyright 2010 BMJ Publishing Group Ltd. DOI: 10.1136/bmj.c2050PubMed ID 21030362