1 From the Harvard Orthopedic Trauma Initiative (A.G.K., E.K.R., M.B.H., M.J.W.), the Department of Orthopedic Surgery (A.G.K., M.J.W.), Brigham and Women's Hospital, the Department of Orthopedic Surgery, Beth Israel Deaconess Medical Center (E.K.R.), and the Department of Orthopaedic Surgery, Massachusetts General Hospital (M.B.H.) - all in Boston; the Department of Surgery, Children's Hospital Colorado, Aurora (T.K.R).; and the Department of Orthopaedics, Cedars-Sinai Medical Center, Los Angeles (M.S.V.).