[1] Teikyo Univ, Chiba Med Ctr, Dept Psychiat, Ichihara, Chiba 2990111, Japan
[2] Chiba Univ, Grad Sch Med, Dept Psychiat, Chiba, Japan
[3] Chiba Univ, Grad Sch Med, Dept Cognit Behav Physiol, Chiba, Japan
[4] Chiba Psychiat Med Ctr, Chiba, Japan
[5] Kimura Hosp, Chiba, Japan
[6] Chiba Univ, Ctr Forens Mental Hlth, Div Clin Neurosci, Chiba, Japan