1. Department of Internal Medicine, Division of Metabolism, Endocrinology and Diabetes, University of Michigan, Ann Arbor, Michigan
2. Department of Epidemiology, University of Pittsburgh, Pittsburgh, Pennsylvania
3. Department of Internal Medicine, Division of Endocrinology, Saint Louis University School of Medicine, St. Louis, Missouri
4. Unidad de Investigación en Epidemiología Clínica, Regional Hospital 1, Mexican Institute of Social Security, Mexico City, Mexico
5. Department of Medicine, Division of Endocrinology, Duke University Medical Center, Durham, North Carolina
6. Department of Internal Medicine, Division of Preventive Medicine, Mayo Clinic, Scottsdale, Arizona
7. Department of Medicine, Division of Endocrinology, University of Toronto, Toronto, Ontario, Canada
8. Division of Endocrinology and Diabetes, Henry Ford Medical Group, Henry Ford Health System, Detroit, Michigan
9. National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland.