Affiliation: | 1. Larner College of Medicine, University of Vermont, Burlington, Vermont, U.S.A.;2. Department of Orthopaedic Surgery, University of Colorado, Boulder, Colorado, U.S.A.;3. Department of Orthopaedic Surgery, Mount Sinai Medical Center, New York, New York, U.S.A.;4. Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois, U.S.A. |