1. Department of Psychiatry, National Hospital Organization, Maizuru Medical Center, 2410 Yukinaga, Maizuru, Kyoto 625-8502, Japan
2. Department of Psychiatry, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan