1. Endocrine Division, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114, USA
2. Denver Health, Denver, Colorado, USA
3. Division of Endocrinology, Metabolism, and Diabetes, University of Colorado School of Medicine, Aurora, Colorado 80204, USA
4. Division of Pediatric Endocrinology, University of Tennessee Health Science Center, Memphis, Tennessee 38103, USA
5. Departments of Cell and Molecular Biology and Medicine, University of Mississippi Medical Center, Jackson, Mississippi 39216, USA
6. The Ohio State University College of Medicine, Division of Endocrinology, Diabetes and Metabolism, Columbus, Ohio 43210, USA