1. Basic Research Program, Laboratory of Genomic Diversity, Science Applications International Corporation-Frederick, Inc., National Cancer Institute, Frederick, MD 21702
2. Hormonal and Reproductive Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD 20892
3. Proyecto Epidemiologico Guanacaste, 301-6151, San Jose, Costa Rica
4. Division of Gynecologic Pathology, Johns Hopkins Medical Institutes, Baltimore, MD 21231
5. Milton S. Hershey Medical Center, Hershey, PA 17033
6. Yale University School of Medicine, New Haven, CT 06520
7. Kaiser Permanente Center for Health Research, Portland, OR 97227