1. Perinatal Epidemiology Research Unit, Aarhus University Hospital, Aarhus, Denmark
2. Horsens Regional Hospital, Horsens, Denmark
3. Section for Epidemiology, Department of Public Health, Aarhus University, Aarhus, Denmark
4. Research Unit for Gynecology and Obstetrics, Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
5. Department of Epidemiology, Fielding School of Public Health, University of California, Los Angeles, Los Angeles, USA
6. Department of Pediatrics, Aarhus University Hospital, Aarhus, Denmark
7. Centre for Arctic Health & Unit for Cellular and Molecular Toxicology, Department of Public Health, Aarhus University, Aarhus, Denmark
8. Department of Environmental Science, Aarhus University, Roskilde, Denmark