Affiliation: | 1. Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois, U.S.A.;2. Department of Orthopaedic Surgery, Naval Medical Center, San Diego, California, U.S.A.;3. Department of Orthopaedic Surgery, Massachusetts General Hospital, Boston, Massachusetts, U.S.A.;4. Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, Connecticut, U.S.A. |