1. Department of Clinical Medicine, University of Bergen, Norway, Department of Obstetrics and Gynecology, Haukeland University Hospital, Bergen, Norway,
2. Department of Clinical Medicine, University of Bergen, Norway, Department of Obstetrics and Gynecology, Haukeland University Hospital, Bergen, Norway, Medical Birth Registry of Norway, Locus of Registry Based Epidemiology, University of Bergen and the Norwegian Institute of Public Health, Bergen, Norway
3. Division of Developmental Origins of Health and Disease, University of Southampton, Southampton, UK
4. Department of Clinical Medicine, University of Bergen, Norway, Department of Obstetrics and Gynecology, Haukeland University Hospital, Bergen, Norway