Affiliation: | 1. Department of Orthopedic Surgery, Rush University Medical Center, Chicago, Illinois, U.S.A.;2. Sports Medicine Program, Rush University Medical Center, Chicago, Illinois, U.S.A.;3. Rush University Medical College, Chicago, Illinois, U.S.A.;4. Division of Sports Medicine, Department of Orthopaedic Surgery, University of Missouri-Columbia, Columbia, Missouri, U.S.A. |