1. 1Division of Metabolism, Endocrinology and Nutrition, Department of Medicine, VA Puget Sound Health Care System and University of Washington, Seattle
2. 2Herbert Wertheim School of Public Health and Human Longevity Science, University of California San Diego, La Jolla, CA
3. 3Division of Endocrinology, Department of Medicine, University of North Carolina, Chapel Hill, NC
4. 4Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD