1 Department of Psychiatry, Hokkaido University Graduate School of Medicine, 060-8638, North 15, West 7, Sapporo, Japan. Electronic address: hashinao@med.hokudai.ac.jp.
2 Tokyo Metropolitan Ohtsuka Hospital, Tokyo, Japan.
3 Department of Neuropsychiatry, Keio University School of Medicine, Tokyo, Japan.
4 Department of Psychiatry, Yokohama City University Medical Center, Yokohama, Japan.
5 Hatsuishi Hospital, Chiba, Japan.
6 Department of Psychiatry, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
7 Department of Psychiatry, Hokkaido University Graduate School of Medicine, Sapporo, Japan; Department of Psychiatry, The Hokkaido Medical Center, Sapporo, Japan.
8 Department of Psychiatry, Hokkaido University Graduate School of Medicine, Sapporo, Japan; Department of Clinical Epidemiology, Translational Medical Center, National Center for Neurology and Psychiatry, Tokyo, Japan.
9 Department of Psychiatry, Hokkaido University Graduate School of Medicine, Sapporo, Japan; Department of Psychiatry, Kushiro City General Hospital, Kushiro, Japan.