1. Department of Public Health Sciences, University of Virginia, Charlottesville, VA
2. Program in Epidemiology, Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA
3. Department of Pathology and Laboratory Medicine, University of Calgary, Calgary Laboratory Services, Calgary, Alberta, Canada
4. Department of Obstetrics and Gynecology, Duke University Medical Center, Durham, NC
5. Huntsman Cancer Institute and Department of Population Health Sciences, University of Utah, Salt Lake City, UT