1. University Health Network, University of Toronto, Toronto, Ontario, Canada.
2. Division of Endocrine Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania.
3. Division of Endocrinology, University of Colorado School of Medicine, Aurora, Colorado.
4. Division of Endocrinology, Harvard Medical School, Division of Endocrinology, Beth Israel Deaconess Medical Center, Boston, Massachusetts.
5. Division of Endocrinology, Metabolism and Molecular Medicine, Northwestern University, Feinberg School of Medicine, Chicago, Illinois.
6. Section of Endocrinology, Diabetes, and Nutrition, Boston University School of Medicine, Boston, Massachusetts.
7. Departments of Surgery and Medicine, Duke Cancer Institute and Duke Clinical Research Institute, Duke University Medical Center, Durham, North Carolina.
8. Division of Head and Neck Endocrine Surgery, Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland.
9. Division of Endocrinology, Georgetown University Medical Center, Washington, DC.