1. Department of Orthopedic Surgery, Japanese Red Cross Aichi Medical Center Nagoya Daiichi Hospital, Nagoya, Japan
2. Department of Orthopedic Surgery, Nagoya University School of Medicine, Nagoya, Japan
3. Department of Orthopedic Surgery, Japan Community Health care Organization Kani Tono Hospital, Kani, Japan
4. Department of Orthopedic Surgery, Yokkaichi Municipal Hospital, Yokkaichi, Japan
5. Department of Orthopedic Surgery, Kariya Toyota General Hospital, Kariya, Japan