[1] Univ Cantabria, Hosp Univ Marques De Valdecilla, Unidad Invest Psiquiat Clin & Social, Dept Psychiat, Santander 39008, Spain
[2] Univ Basque Country, Dept Neurosci, Bilbao, Spain
[3] Acad Med Ctr, Dept Psychiat, Amsterdam, Netherlands
[4] Copenhagen Univ Hosp, Hvidovre Hosp, Copenhagen Hosp Corp, Dept Psychiat, Copenhagen, Denmark
[5] Kings Coll London, Inst Psychiat, Sect Community Psychiat PRiSM, London WC2R 2LS, England
[6] Univ Leipzig, Dept Psychiat, Leipzig, Germany
[7] Univ Verona, Dept Med & Publ Hlth, Sect Psychiat, I-37100 Verona, Italy