1 Department of Neuropsychiatry, Oita University Faculty of Medicine, Idaigaoka 1-1, Hasama-machi, Yufu City, Oita 879-5593, Japan. Electronic address: hira-hiro@oita-u.ac.jp.
2 Department of Neuropsychiatry, Oita University Faculty of Medicine, Idaigaoka 1-1, Hasama-machi, Yufu City, Oita 879-5593, Japan.