1. Department of Psychiatry, Tokyo Medical University, Tokyo, Japan
2. The Medical Foundation of Keishin-Kai, Kyouwa Hospital, Daisen, Akita, Japan
3. Department of Psychiatry, National Defense Medical College, Tokorozawa, Saitama, Japan
4. Department of Psychiatry, Toranomon Hospital Kajigaya, Kawasaki, Kanagawa, Japan.
5. Department of Psychiatry, Tokyo Medical University Hachioji Medical Center, Hachioji, Tokyo, Japan
6. Department of Psychiatry, Toranomon Hospital, Tokyo, Japan