1. School of Public Health in the Graduate School of Medicine, Kyoto University; Department of Healthcare Epidemiology; Yoshida Konoe-cho, Sakyo-ku Kyoto Japan 606-8501
2. Kyoto University Graduate School of Medicine/School of Public Health; Department of Health Promotion and Human Behavior; Yoshida Konoe-cho, Sakyo-ku Kyoto Japan 606-8501
3. Kyoto University Hospital; Department of Psychiatry; Kyoto Japan
4. McMaster University; Department of Psychiatry and Behavioural Neurosciences; 100 West 5th Street Room B-366 Hamilton ON Canada L8N 3K7