[1] Kure Med Ctr, Inst Clin Res, Kure 7370023, Japan
[2] NHO, Dept Psychiat, Kure Med Ctr, Kure, Japan
[3] Yamaguchi Univ, Sch Med, Dept Neurosci, Yamaguchi, Japan
[4] Hiroshima Univ, Grad Sch Biomed Sci, Div Frontier Med Sci, Dept Psychiat & Neurosci, Hiroshima, Japan