1. From the Penn State College of Medicine, Hershey, PA (J.H., G.J., J.S.); Departments of Orthopaedics (M.A.) and Radiology (C.F., J.P.T.), Penn State Hershey Medical Center, 500 University Dr, HG300B, Hershey, PA 17033; and Geisinger Commonwealth School of Medicine, Scranton, PA (J.P.T.).