1. Department of Environmental Health Sciences Yale School of Public Health New Haven Connecticut USA
2. Yale Center for Perinatal, Pediatric, and Environmental Epidemiology Yale School of Public Health New Haven Connecticut USA
3. Research Unit for Gynaecology and Obstetrics, Department of Clinical Research University of Southern Denmark Odense Denmark
4. National Institute of Public Health University of Southern Denmark Copenhagen Denmark
5. Department of Public Health, Section of Epidemiology, Faculty of Health and Medical Sciences University of Copenhagen Copenhagen Denmark
6. Department of Public Health, Section for Epidemiology Aarhus University Aarhus Denmark
7. Department of Clinical Epidemiology Aarhus University Hospital Aarhus Denmark
8. Novo Nordisk Foundation Centre for Basic Metabolic Research, Section on Metabolic Genetics, Faculty of Health and Medical Sciences University of Copenhagen Copenhagen Denmark