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. Institute of Clinical Research, University of Southern Denmark, Odense, Denmark
4. Centre of Women’s Family and Child Health, University of South-Eastern Norway, Kongsberg, Norway
5. Department of Public Health, Research Unit for Epidemiology, University of Aarhus, Aarhus, Denmark
6. Department of Environmental Science, University of Aarhus, Roskilde, Denmark
7. Department of Epidemiology, Fielding School of Public Health, University of California, Los Angeles, Los Angeles, California, USA
8. Department of Statistics, UCLA College of Letters and Science, Los Angeles, California, USA
9. Department of Clinical Epidemiology, Aarhus University Hospital, Skejby, Denmark