1. Section on Ethnicity and Health, Diabetes, Endocrinology and Obesity Branch, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland
2. National Institutes of Health Clinical Center, Bethesda, Maryland
3. Laboratory of Biological Modeling, National Institute of Diabetes, Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland
4. National Institute of Minority Health and Health Disparities, National Institutes of Health, Bethesda, Maryland