1. Department of Orthopaedic Surgery, School of Medicine, University of Occupational and Environmental Health, Japan. Yahatanishi-ku, Kitakyushu 807-8555, Japan
2. Department of Emergency Medicine, School of Medicine, University of Occupational and Environmental Health, Japan. Yahatanishi-ku, Kitakyushu 807-8555, Japan
3. Graduate School of Health and Sport Science, Nippon Sport Science University, Japan. Setagaya-ku, Tokyo 158-8508, Japan