1. Medical Oncology Branch, Center for Cancer Research, National Cancer Institute (NCI), Bethesda, MD;
2. Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA;
3. Division of Cancer Epidemiology and Genetics, NCI, Bethesda, MD;
4. Walter Reed Army Medical Center, Washington, DC; and
5. Karolinska University Hospital and Institute, Stockholm, Sweden