1. Department of OB/GYN & Reproductive Sciences, Magee-Womens Research Institute, University of Pittsburgh School of Medicine, M240 Scaife Hall, 3550 Terrace St, Pittsburgh, PA 15261, USA
2. Department of Epidemiology, University of Pittsburgh Graduate School of Public Health, 130 De Soto St, Pittsburgh, PA 15261, USA
3. Department of Genetic Epidemiology/Division of Public Health, University of Utah, Salt Lake City, UT 84112, USA
4. Department of OB/GYN, Division of Gynecologic Oncology, University of Pittsburgh Medical Center, 200 Lothrop St, Pittsburgh, PA 15213, USA