1. Division of Metabolism, Endocrinology and Diabetes, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan.
2. Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, Georgia.
3. Division of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California.
4. Division of General Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan.