1. Keio University School of Medicine; Department of Psychiatry and the Center for Clinical Research; Shinanomachi 35, Shinjuku-ku Tokyo Japan 160-8582
2. National Center of Neurology and Psychiatry; Department of Clinical Epidemiology; 4-1-1 Ogawa-higashi Kodaira Tokyo Tokyo Japan 187-8551
3. Toyokawa City Hospital; Department of Psychiatry; Koumei 1-19 Toyokawa Aichi Japan 442-8561
4. University of Verona; Department of Public Health and Community Medicine, Section of Psychiatry; Policlinico "GB Rossi" Piazzale L.A. Scuro, 10 Verona Italy 37134
5. University of Oxford; Department of Psychiatry; Warneford Hospital Oxford UK OX3 7JX
6. National Collaborating Centre for Women's and Children's Health; 4th Floor, King's Court 2-16 Goodge Street London UK W1T 2QA
7. University of Bristol; Centre for Academic Mental Health, School of Social and Community Medicine; Oakfield House Oakfield Grove Bristol UK BS8 2BN
8. 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