1. The Hughston Clinic, Columbus, Georgia
2. University of Manitoba Section of Orthopaedic Surgery, Health Sciences Centre, Winnipeg, Manitoba, Canada
3. University of Pittsburgh Medical Center, Department of Orthopaedic Surgery, Pittsburgh, Pennsylvania
4. Canyon Orthopaedic Surgeons, Phoenix, Arizona
5. Sports Medicine & Orthopaedic Institute, Duluth, Georgia
6. Burke and Bradley Orthopaedics, Pittsburgh, Pennsylvania