Dr. Michael A. Levine is Chief of Endocrinology and Diabetes and Director of the Center for Bone Health at The Children’s Hospital of Philadelphia. Dr. Levine holds the Lester Baker Endowed Chair and is Professor of Pediatrics and Medicine at the University of Pennsylvania Perelman School of Medicine. Dr. Levine’s research focuses on the genetic basis of disorders of bone and mineral metabolism and complements his clinical expertise in endocrine diseases that affect bone and mineral metabolism. His approach is to apply molecular and genetic tools to analyze the basis of altered hormone action, particularly in G protein-coupled signal transduction systems that affect growth and development. He has identified or contributed to the molecular basis of several inherited disorders of bone and mineral metabolism, including familial hypoparathyroidism, pseudohypoparathyroidism, cherubism, and the McCune Albright syndrome. His research interests now extend to the molecular events that control embryological development of the parathyroid glands and genetic modifiers of vitamin D action.