1. Department of Orthopaedic Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
2. Hand and Upper Extremity Service, Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
3. Department of Orthopaedic Biomaterial Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
4. Department of Sports Medical Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.
5. Department of Orthopaedic Surgery, Bell Land General Hospital, Sakai, Osaka, Japan