Affiliation: | 1. Department of Orthopaedic Surgery, University of Minnesota, Minneapolis, Minnesota, U.S.A.;2. Elite Sports Medicine/Connecticut Children''s Medical Center, Hartford, Connecticut, U.S.A.;3. Department of Orthopaedic Surgery, University of Virginia, Charlottesville, Virginia, U.S.A.;4. Northwest Iowa Bone, Joint, and Sports Surgeons, Spencer, Iowa, U.S.A. |