1. New York Medical College, Valhalla, NY, USA.
2. Department of Orthopedic Surgery, Westchester Medical Center, Westchester, NY, USA.
3. Department of Orthopaedic Surgery, Pomona Valley Hospital Medical Center, Pomona Valley, CA, USA.
4. Department of Orthopedic Surgery, Loma Linda Medical Center, Loma Linda, CA, USA.