1. Department of Anatomy, Tokyo Medical University, Japan
2. Department of Rehabilitation, Hiroo Orthopedics, Japan
3. Graduate School of Health Care Sciences, Bunkyo Gakuin University, Japan
4. Department of Anatomy, School of Medicine, International University of Health and Welfare: 4-3 Kozunomori, Narita, Chiba 286-8686, Japan
5. Department of Rehabilitation, Sonoda Second Hospital, Japan