1. Division of Endocrinology, Diabetes, Metabolism and Molecular Medicine, New England Medical Center and Tufts University School of Medicine, 750 Washington St., Boston, MA 02111
2. Lipid Metabolism Laboratory, Jean Mayer US Department of Agriculture Human Nutrition Research Center on Aging at Tufts University, Boston, MA 02111
3. Department of Epidemiology and Biostatistics, Boston University School of Public Health, Boston, MA 02118-2394
4. Framingham Heart Study, National Institutes of Health, National Heart, Lung, and Blood Institute, Framingham, MA 01702