[1] Univ Aiekenhuis Gasthuisberg, Louvain, Belgium
[2] Eli Lilly & Co, European Hlth Outcomes Res, Windlesham, Surrey, England
[3] Eli Lilly & Co, European Med Informat Sci, Windlesham, Surrey, England
[4] Hop Hotel Dieu, Unite Psychiat, Paris, France
[5] Hosp Univ Salamanca, Dept Psychiat, Salamanca, Spain
[6] Boehringer Ingelheim GmbH & Co KG, Global Hlth Econ & Outcomes Res, Ingelheim, Germany
[7] Univ Hosp Carl Gustav Carus, Dept Psychiat & Psychotherapy, Dresden, Germany
[8] Inst Psychiat, Hlth Serv Populat Res Dept, London, England
[9] Univ Ferrara, Sect Psychiat, I-44100 Ferrara, Italy