1 Department of Neuropsychiatry, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, Okayama, Japan oyokota1@yahoo.co.jp.
2 Department of Psychiatry, Kinoko Espoir Hospital, Kasaoka, Japan.
3 Department of Psychiatry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
4 Department of Neuropsychiatry, Okayama University Graduate School of Medicine Dentistry and Pharmaceutical Sciences, Okayama, Japan.