1. 1Department of PathologyWakayama Medical University, Kimiidera 811-1, Wakayama 641-0012, Japan2Department of RehabilitationOsaka Kawasaki Rehabilitation University, Mizuma 158, Kaizuka City, Osaka 597-0104, Japan3Department of Advanced Medical ScienceInstitute of Medical Science, University of Tokyo, Shirokanedai, 4-6-1, Minato-ku, Tokyo 108-8639, Japan