John Potts, MD, DSc, is a Founder of Radius and is the Jackson Distinguished Professor of Clinical Medicine at the Massachusetts General Hospital (MGH) and Harvard Medical School. An internationally recognized authority on calcium metabolism and the hormonal mechanisms that govern it, Dr. Potts has been a pioneer in the chemistry and biology of parathyroid hormone (PTH) and its role in clinical disorders of bone and mineral ion metabolism. His research interests focus on calcium and bone metabolism and PTH; his clinical work is on disorders of calcium metabolism and osteoporosis. Previously, Dr. Potts served as Director of Research, as Chairman of the Department of Medicine and Physician-in-Chief, and as Chief of the Endocrine Unit at MGH. Previous to that, he conducted research on protein chemistry at the National Institutes of Health with Nobel laureate Christian Anfinsen. His honors and awards include the Association of Professors of Medicine’s Robert H. Williams, MD, Distinguished Chair of Medicine Award (2002); the Biomedical Science Career Program Hope Award (2001); the Endocrine Society’s Fred Konrad Koch Award (1991); and the American Society for Bone and Mineral Research’s William F. Neumann Award (1987). He holds active and honorary memberships in a number of scientific and professional organizations including the Institute of Medicine and the American Academy of Arts and Sciences and is an elected member of the National Academy of Sciences. He received an MD from the University of Pennsylvania.