Gregory A. Brent, MD is Professor of Medicine and Physiology, David Geffen School of Medicine at UCLA. He received his clinical endocrinology training at Brigham and Women's Hospital in Boston and completed a research fellowship at Massachusetts General Hospital. His research focus is on studies on the molecular mechanisms of thyroid hormone action and the regulation of iodine transport in hormone-dependent cancers. He has conducted clinical research in hypothyroidism and thyroid disease in pregnancy. He is an elected member of the American Society for Clinical Investigation and Association of American Physicians. He has previously served the American Thyroid Association as Board Chair, Secretary/Chief Operating Officer and President. He has been recognized with the American Thyroid Association Van Meter, Ingbar, and Braverman Awards as well as the Endocrine Society Knoll Mentor Award. He is past chair of the National Institutes of Health, Molecular and Cellular Endocrinology Study Section. He has been on the editorial boards of Journal of Clinical Endocrinology and Metabolism, Molecular Endocrinology, Thyroid and Endocrinology.