1. Department of Obstetrics and Gynecology, Carle Illinois College of Medicine, Champaign, Illinois, USA.
2. Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Kentucky Markey Cancer Center, Lexington, Kentucky, USA.
3. Department of Public Health, Division of Epidemiology, The Ohio State University College of Public Health, Columbus, Ohio, USA.
4. Department of Obstetrics and Gynecology, The Ohio State University Wexner Medical Center, Columbus, Ohio, USA.
5. The Ohio State University Comprehensive Cancer Center, Columbus, Ohio, USA.