1. Osaka National Hospital, Department
of Orthopaedic Surgery, 2-1-14 Hoenzaka Chuo-ku, Osaka, 540-0006, Japan.
2. Osaka University Graduate School of Medicine, Department
of Orthopaedic Surgery, 2-2, Yamadaoka, Suita, 565-0871, Japan.
3. Osaka University Graduate School of Medicine, Department
of Orthopaedic Medical Engineering, 2-2, Yamadaoka, Suita, 565-0871, Japan.