1. Department of Obstetrics and Gynecology; Columbia University College of Physicians and Surgeons; New York NY USA
2. Herbert Irving Comprehensive Cancer Center; Columbia University College of Physicians and Surgeons; New York NY USA
3. New York Presbyterian Hospital; New York NY USA
4. Department of Epidemiology; Mailman School of Public Health; Columbia University; New York NY USA
5. Department of Medicine; Columbia University College of Physicians and Surgeons; New York NY USA