[1] Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Psychiat, Kita Ku, 2-5-1 Shikata Cho, Okayama 7008558, Japan
[2] Hayashi Hosp, Dept Psychiat, Okayama, Japan
[3] Zikei Hosp, Dept Psychiat, Okayama, Japan
[4] Nagasaki Univ, Dept Locomot Rehabil Sci, Grad Sch Med, Nagasaki, Japan
[5] Tohoku Univ, Dept Neurol Sci, Grad Sch Med, Sendai, Miyagi, Japan