1 Department of Dermatology, Oslo University Hospital, Oslo, Norway; Institute of Clinical Medicine, University of Oslo, Oslo, Norway. Electronic address: k.m.a.s.endre@medisin.uio.no.
2 Department of Dermatology, Oslo University Hospital, Oslo, Norway; Institute of Clinical Medicine, University of Oslo, Oslo, Norway.
3 Oslo Centre for Biostatistics and Epidemiology, Oslo University Hospital, Oslo, Norway.
4 Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway.
5 Institute of Clinical Medicine, University of Oslo, Oslo, Norway; Division of Obstetrics and Gynaecology, Oslo University Hospital, Oslo, Norway.
6 Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden; Department of Womeńs and Childreńs Health, Karolinska Institutet, Stockholm, Sweden.
7 Genetic Unit, Centre for Laboratory Medicine, Østfold Hospital, Kalnes, Norway; Faculty of Chemistry, Biotechnology, and Food Science, Norwegian University of Life Sciences, Ås, Norway.
8 Faculty of Chemistry, Biotechnology, and Food Science, Norwegian University of Life Sciences, Ås, Norway.