[1] Yamaguchi Univ, Grad Sch Med, Div Mol Anal Human Disorders, Dept Bio Signal Anal, Ube, Yamaguchi 7558505, Japan
[2] Yamaguchi Univ, Grad Sch Med, Div Neuroanat, Dept Neurosci, Ube, Yamaguchi 7558505, Japan
[3] Yamaguchi Univ, Hlth Serv Ctr, Org Univ Educ, Ube, Yamaguchi 7558505, Japan
[4] Kyoto Univ, Grad Sch Med, Dept Hlth & Environm Sci, Kyoto, Japan
[5] Tohoku Univ, Grad Sch Med, Dept Internal Med, Div Mol Metab & Diabet, Sendai, Miyagi 980, Japan