Williams textbook of endocrinology / [edited by] Shlomo Melmed, MBChB, MACP, Professor of Medicine, Senior Vice President and Dean of the Medical Faculty, Cedars-Sinai Medical Center, Los Angeles, California, Kenneth S. Polonsky, MD, Richard T. Crane Distinguished Service Professor, Dean of the Division of the Biological Sciences and the Pritzker School of Medicine, Executive Vice President for Medical Affairs, The University of Chicago, Chicago, Illinois, P. Reed Larsen, MD, FRCP, Professor of Medicine, Harvard Medical School, Senior Physician, Division of Endocrinology, Diabetes, and Metabolism, Brigham and Women's Hospital, Boston, Massachusetts, Henry M. Kronenberg, MD, Professor of Medicine, Harvard Medical School, Chief, Endocrine Unit, Massachusetts General Hospital, Boston, Massachusetts.