1. Department of Obstetrics and Gynecology, Columbia University College of Physicians and Surgeons, New York, New York2Herbert Irving Comprehensive Cancer Center, Columbia University College of Physicians and Surgeons, New York, New York3New York Presbyteria
2. Department of Obstetrics and Gynecology, Columbia University College of Physicians and Surgeons, New York, New York
3. Department of Obstetrics and Gynecology, Columbia University College of Physicians and Surgeons, New York, New York2Herbert Irving Comprehensive Cancer Center, Columbia University College of Physicians and Surgeons, New York, New York5Department of Medici
4. Department of Obstetrics and Gynecology, Columbia University College of Physicians and Surgeons, New York, New York4Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York
5. Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York
6. Herbert Irving Comprehensive Cancer Center, Columbia University College of Physicians and Surgeons, New York, New York3New York Presbyterian Hospital, New York, New York4Department of Epidemiology, Mailman School of Public Health, Columbia University, New