1. Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
2. Division of Obstetrics and Gynaecology, Oslo University Hospital, Oslo, Norway
3. Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
4. Astrid Lindgren Children’s Hospital, Karolinska University Hospital, Stockholm, Sweden
5. Department of Women’s and Children’s Health, Karolinska Institutet, Stockholm, Sweden
6. Department of Virology, Norwegian Institute of Public Health, Oslo, Norway
7. Genetic Unit, Centre for Laboratory Medicine, Østfold Hospital Trust, Kalnes, Norway
8. Department of Dermatology and Vaenerology, Oslo University Hospital, Oslo, Norway