1. Department of Epidemiology, Harvard T.H. Chan School of Public Health , Boston, MA, USA
2. Department of Social and Behavioral Sciences, Harvard T.H. Chan School of Public Health , Boston, MA, USA
3. Department of Environmental Health, Harvard T.H. Chan School of Public Health , Boston, MA, USA
4. Office of Educational Programs, Harvard T.H. Chan School of Public Health , Boston, MA, USA
5. Department of Obstetrics and Gynecology, Vincent Center for Reproductive Biology, Massachusetts General Hospital Fertility Center , Boston, MA, USA
6. Department of Radiology and Physical Medicine, School of Medicine, Center for Biomedical Research (CIBM), University of Granada , Granada, Spain
7. Instituto de Investigación Biosanitaria Ibs GRANADA , Granada, Spain
8. Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP) , Madrid, Spain