1. University of Verona; Department of Public Health and Community Medicine, Section of Psychiatry; Policlinico "G.B.Rossi" Piazzale L.A. Scuro, 10 Verona Italy 37134
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 601-8501
3. University of Bristol; Academic Unit of Psychiatry, School of Social and Community Medicine; Oakfield House Oakfield Grove Bristol UK BS8 2BN
4. Nagoya City University Graduate School of Medical Sciences; Department of Psychiatry & Cognitive-Behavioral Medicine; Kawasumi 1 Mizuho-cho, Mizuho-ku Nagoya Aichi Japan 467-8601