1. Department of Psychiatry, National Center Hospital, National Center of Neurology and Psychiatry, Tokyo, Japan (S. Igarashi, K. Okita, D. Hayashi, T. Noda, S. Kito); Department of Neuropsychiatry, Kyorin University Faculty of Medicine, Tokyo, Japan (S. Igarashi, K. Watanabe); Department of Psychiatry, Jikei University School of Medicine, Tokyo, Japan (R. Yamazaki, Y. Matsuda, S. Kito)