1. Psychiatric and Mental Health Nursing, St. Luke’s International University, Tokyo 104-0044, Japan
2. Department of Neuropsychiatry, Kyorin University School of Medicine, Tokyo 181-8611, Japan
3. Department of Neuropsychiatry, Akita University Graduate School of Medicine, Akita 010-8543, Japan
4. Katsumoto Mental Clinic, Osaka 543-0056, Japan
5. Community Mental Health & Welfare Bonding Organization, Chiba 272-003, Japan
6. Department of Psychiatry, Kitasato University School of Medicine, Kanagawa 252–0374, Japan
7. Department of Neuropsychiatry, Graduate School of Medicine, University of the Ryukyus, Okinawa 903-0215, Japan