Affiliation: | 1. Department of Orthopedics and Physical Rehabilitation, University of Massachusetts Medical School, Worcester, Massachusetts;2. Department of Orthopaedic Surgery, Hartford Hospital, Hartford, Connecticut;3. Division of Clinical Immunology and Rheumatology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama;4. Department of Orthopedics and Physical Rehabilitation, Clinical and Outcomes Research, University of Massachusetts Medical School, Worcester, Massachusetts |