1. Department of Obstetrics and Gynaecology, Odense University Hospital, Sdr. Boulevard 29, DK-5000 Odense C, Denmark
2. Institute of Clinical Research, University of Southern Denmark, J.B. Winsløws Vej 19, DK-5000 Odense C, Denmark
3. OPEN, Odense Patient data Explorative Network, Odense University Hospital, J.B. Winsløws Vej 9a, DK-5000 Odense C, Denmark
4. Department of Obstetrics, Copenhagen University Hospital (Rigshospitalet), Juliane Maries Vej 9, DK-2100 Copenhagen Ø, Denmark
5. The Research Unit Women’s and Children’s Health, Section 7821 Juliane Marie Centre, Copenhagen University Hospital (Rigshospitalet), Blegdamsvej 9, DK-2100 Copenhagen Ø, Denmark
6. Department of Clinical Medicine, Aalborg University, Søndre Skovvej 15, DK-9000 Aalborg, Denmark
7. Department of Obstetrics and Gynaecology, Aalborg University Hospital, Reberbansgade 9, DK-9000 Aalborg, Denmark
8. Department of Paediatrics, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, DK-8200 Aarhus N, Denmark
9. Perinatal Epidemiology Research Unit, Department of Paediatrics, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, DK-8200 Aarhus N, Denmark