1. Department of Orthopaedic Surgery, MedStar Georgetown University Hospital, Washington, DC
2. Department of Orthopaedic Surgery, Harvard Combined Orthopaedic Residency Program, Harvard Medical School, Boston, Massachusetts
3. Department of Orthopaedic Surgery, George Washington School of Medicine and Health Sciences, Washington, DC
4. Department of Orthopaedic Surgery and Rehabilitation, Loyola University Medical Center, Maywood, Illinois
5. Department of Orthopaedic Surgery, Columbia University Medical Center, New York, NY