1. Department of Orthopedic Surgery, Tottori Red Cross Hospital, 117, Shotoku-cho, Tottori, Tottori, 680-8517, Japan.
2. Department of Orthopedic Surgery, Faculty of Medicine, Tottori University, 36-1 Nishi-machi, Yonago, Tottori 683-8504, Japan.
3. Department of Orthopedic Surgery, Matsue City Hospital, 32-1, Noshiro-cho, Matsue, Shimane, 690-8509, Japan.