1. Kobori Orthopedic Clinic: 548-2 Nearaichou, Kita-ku, Hamamatsu city, Shizuoka 433-8108, Japan
2. Department of Physical Therapy, Fukuoka International University of Health and Welfare, Japan
3. Fukuoka University Nishijin Hospital, Japan
4. Department of Physical Therapy, International University of Health and Welfare, Japan