1. Division of Endocrinology, Metabolism and Diabetes, Department of Medicine, University of Colorado School of Medicine, Anschutz Medical Campus, Aurora, Colorado, USA.
2. Division of Endocrinology, Diabetes and Hypertension, Department of Medicine, Brigham and Women's Hospital-Harvard Medical School, Boston, Massachusetts, USA.
3. Division of Endocrinology, Diabetes, Metabolism and Nutrition, Department of Medicine, Mayo Clinic, Rochester, Minnesota, USA.
4. Division of Endocrinology, Diabetes and Bone Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, Department of Medicine New York, New York, New York, USA.
5. Division of Endocrinology, Gerontology and Metabolism, Department of Medicine, Stanford University School of Medicine, Stanford, California, USA.
6. Division of Endocrinology, Metabolism and Lipids, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia, USA.
7. Division of Endocrinology and Metabolism, Department of Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
8. Endocrinology Service, Medicine Service, Veterans Affairs North Texas Health Care System, Dallas, Texas, USA.
9. Division of Endocrinology, Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
10. Endocrinology Service, Medicine Service, Clement J Zablocki Veterans Affairs Medical Center, Milwaukee, Wisconsin, USA.
11. Division of Endocrinology and Metabolism, Department of Medicine, Duke University Medical Center, Durham, North Carolina, USA.
12. Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Beth Israel Deaconess Medical Center-Harvard Medical School, Boston, Massachusetts, USA.
13. Endocrinology Service, Medicine Service, Rocky Mountain Regional Veterans Affairs Medical Center, Aurora, Colorado, USA.