1. Department of Orthopedic Surgery, Kobe University Graduate School of Medicine, 7-5-2 Kusunoki-cho, Chuo-ku, Kobe Hyogo 650-0017, Japan
2. Division of Rehabilitaion Medicine, Kobe University Graduate School of Medicine, 7-5-2 Kusunoki-cho, Chuo-ku, Kobe Hyogo 650-0017, Japan