Affiliation: | 1. Southern Oregon Orthopedics, Medford, and Department of Orthopaedics and Rehabilitation, Oregon Health & Science University, Portland, Oregon, U.S.A.;2. The San Antonio Orthopaedic Group, San Antonio, and the Department of Orthopaedic Surgery, University of Texas Health Science Center at San Antonio, San Antonio, Texas, U.S.A. |