1. Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts.
2. Laboratory of Clinical Chemistry and Hematology, Máxima Medical Centre, Veldhoven, The Netherlands.
3. Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts.
4. Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts.
5. Vincent Obstetrics and Gynecology, Massachusetts General Hospital Fertility Center, Harvard Medical School, Boston, Massachusetts.