1. Graduate School of Medicine, Shinshu University, Japan
2. Faculty of Health Sciences, Iryo Sosei University: 5-5-1 Chuodai Iino, Iwaki-shi, Fukushima 970-8551, Japan
3. Department of Rehabilitation, North Alps Medical Center Azumi Hospital, Japan
4. Department of Orthopedic Surgery, North Alps Medical Center Azumi Hospital, Japan