1. From the Center for the Advancement of Value in Musculoskeletal Care, Hospital for Special Surgery, New York (C.H.M.); the University of Michigan Department of Internal Medicine and Institute for Healthcare Policy and Innovation and the Veterans Affairs Ann Arbor Center for Clinical Management and Research, Ann Arbor (E.A.K.); and the American College of Physicians, Philadelphia (A.Q.); and the ACP Performance Measurement Committee (C.H.M., E.A.K.). The other members of the Performance Measurement...