1. Metabolic Epidemiology Branch, Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, Maryland
2. Social Epidemiology Research Unit, Social Behavioral Research Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland
3. Division of Cancer Epidemiology and Genetics, Surveillance Research Program, National Cancer Institute, Bethesda, Maryland
4. Information Management Services, Inc., Rockville, Maryland
5. Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, Maryland
6. Epidemiology and Biostatics Program, Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, Maryland