1. Department of Rehabilitation Medicine, School of Medicine, Wakayama Medical University, Wakayama 641-8509, Japan
2. Department of Rehabilitation Medicine, Graduate School of Medical Science, Kyoto Prefectual University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan
3. Department of Rehabilitation Medicine, Dokkyo Medical University Saitama Medical Center, Saitama 343-8555, Japan
4. Department of Rehabilitation Medicine, Kibikogen Rehabilitation Center for Employment Injuries, Kibichuo-cho, Okayama 716-1241, Japan
5. Research Center of Sports Medicine and Balneology, Nachikatsuura Balneologic Town Hospital, Tenma-Nachikatuura-cho, Wakayama 649-5331, Japan