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