1. Department of Paediatrics and Adolescent Medicine Copenhagen University Hospital – Rigshospitalet Copenhagen Denmark
2. Department of Obstetrics and Gynaecology Copenhagen University Hospital – Amager‐Hvidovre HvidovreDenmark
3. Department of Clinical Medicine University of Copenhagen Copenhagen Denmark
4. Department of Paediatrics and Adolescent Medicine University Hospital Aarhus Aarhus Denmark
5. Department of Neonatology Copenhagen University Hospital – Rigshospitalet Copenhagen Denmark
6. National Institute of Public Health University of Southern Denmark Copenhagen Denmark