1. Department of Rehabilitation, Osaka Kawasaki Rehabilitation University, 158 Mizuma, Kaizuka, Osaka 597-0104, Japan
2. Department of Orthopedic Surgery, Wakayama Medical University, 811 Kimiidera, Wakayama 641-8510, Japan
3. Department of Strategic Surveillance for Functional Food and Comprehensive Traditional Medicine, Wakayama Medical University, 811 Kimiidera, Wakayama, Wakayama 641-8510, Japan