1. Department of Orthopaedic Surgery, University of Texas Health Science Center San Antonio, San Antonio, TX
2. Department of Orthopaedic Surgery, University of Maryland Medical System, Baltimore, MD
3. Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA
4. Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, CA
5. Department of Orthopaedic Surgery, Hospital for Special Surgery and New York Presbyterian Hospital, New York, NY
6. Department of Orthopaedic Surgery, University of Toronto, Toronto, ON, Canada; and
7. Department of Orthopaedic Surgery, Western University, London, ON, Canada.