1. Orthopaedic Biomechanics Laboratory, Congress Medical Foundation, Pasadena, CA, USA.
2. Department of Orthopedic Surgery, Osaka Medical and Pharmaceutical University, Takatsuki, Osaka, Japan.
3. Kerlan-Jobe Orthopaedic Clinic, Los Angeles, CA, USA.
4. Arthrex Inc., Naples, FL, USA.