1. Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland
2. Departments of Epidemiology and Pediatrics, Geisel School of Medicine at Dartmouth, the Norris Cotton Cancer Center, Lebanon, New Hampshire
3. Department of Epidemiology, Boston University School of Public Health, Boston, Massachusetts
4. Slone Epidemiology Unit, Boston University, Boston, Massachusetts
5. Department of Public Health Sciences, University of Chicago, Chicago, Illinois
6. Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Medical School, Worcester, Massachusetts
7. Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas
8. Information Management Services, Inc., Rockville, Maryland