1. Johns Hopkins Bloomberg School of Public Health, Department of Epidemiology, Welch Center for Prevention, Epidemiology and Clinical Research, Baltimore, Maryland;
2. Johns Hopkins Medicine, Baltimore, Maryland;
3. Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, Maryland;
4. Duke University Medical Center, Durham, North Carolina,
5. Division of Public Health Sciences, Wake Forest University, Winston-Salem, North Carolina;
6. Division of Endocrinology, Diabetes and Nutrition, St. Luke's-Roosevelt Hospital Center, Columbia University College of Physicians and Surgeons, New York, New York;
7. Division of Metabolism, Endocrinology and Nutrition, Department of Medicine, VA Puget Sound Health Care System and University of Washington, Seattle, Washington.