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. Department of Public Health, Research Unit for Epidemiology, Aarhus University, Aarhus, Denmark
4. Department of Obstetrics and Gynaecology, Aalborg University Hospital, Aalborg, Denmark
5. Department of Clinical Medicine, Aalborg University, Aalborg, Denmark
6. Department of Cancer Prevention and Control, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing
7. Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark