1. Division of Paediatric and Adolescent Medicine Oslo University Hospital Oslo Norway
2. Faculty of Medicine Institute of Clinical Medicine University of Oslo Oslo Norway
3. Department of Dermatology Oslo University Hospital Oslo Norway
4. Department of Nutrition Institute of Basic Medical Sciences University of Oslo Oslo Norway
5. Department of Toxicology and Risk Assessment Norwegian Institute of Public Health Oslo Norway
6. Division of Obstetrics and Gynaecology Oslo University Hospital Oslo Norway
7. Astrid Lindgren Children's Hospital Karolinska University Hospital Stockholm Sweden
8. Department of Women′s and Children′s Health Karolinska Institutet Stockholm Sweden
9. Genetic Unit Centre for Laboratory Medicine Østfold Hospital Trust Kalnes Norway
10. Faculty of Chemistry, Biotechnology and Food Science Norwegian University of Life Sciences Ås Norway
11. Department of Pediatrics Østfold Hospital Trust Kalnes Norway
12. Service de Pneumologie Department of Biology and Medicine CHUV‐UNIL Lausanne Switzerland
13. Department of Obstetrics and Gynaecology Østfold Hospital Trust Kalnes Norway
14. Department of Biosciences and Nutrition Karolinska Institutet Stockholm Sweden