1. Department of Obstetrics and Gynecology; Columbia University College of Physicians and Surgeons; New York New York
2. Herbert Irving Comprehensive Cancer Center; Columbia University College of Physicians and Surgeons; New York New York
3. Department of Epidemiology; Joseph L. Mailman School of Public Health; Columbia University; New York New York
4. Department of Health Policy and Management; Joseph L. Mailman School of Public Health; Columbia University; New York New York
5. Department of Medicine; Columbia University College of Physicians and Surgeons; New York New York