1. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
2. Kelly Gynecologic Oncology Service, Johns Hopkins Hospital, Baltimore, Maryland, USA
3. Department of Radiation Oncology and Population Health Sciences, University of Utah, Salt Lake City, Utah, USA
4. HIV/STD/HCV Epidemiology and Surveillance Branch, Texas Department of State Health Services, Austin, Texas, USA
5. Bureau of Cancer Epidemiology, New York State Department of Health, Albany, New York, USA
6. Information Management Services, Inc, Calverton, Maryland, USA
7. Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, Maryland, USA