1. Department of Rehabilitation Science, Graduate School of Health Science; Gunma University; 39-22 Showa-machi 3-chome, Maebashi Gunma Japan
2. Department of Anatomy, Graduate School of Medicine; Gunma University; 39-22 Showa-machi 3-chome, Maebashi Gunma Japan
3. Research Institute for Microbial Diseases; Osaka University; Suita Osaka Japan