1. Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics, Department of Health and Human Services, National Cancer Institute, National Institutes of Health, Rockville, Maryland.
2. Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, University of Maryland, Baltimore, Maryland.
3. Division of Endocrinology, Diabetes and Nutrition, Department of Medicine, Baltimore Veterans Health Administration Medicine Center, Baltimore, Maryland.
4. Biostatistics Branch, Division of Cancer Epidemiology and Genetics, Department of Health and Human Services, National Cancer Institute, National Institutes of Health, Rockville, Maryland.