1. Department of Obstetrics and Gynecology, University of Colorado School of Medicine, Aurora, Colorado, USA.
2. Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA.
3. Jane Fonda Center, Emory University, Atlanta, Georgia, USA.
4. Department of Gynecology and Obstetrics, School of Medicine, Emory University, Atlanta, Georgia, USA.