[1] Univ Hosp Bellvitge, Dept Psychiat, IDIBELL, Barcelona 08907, Spain
[2] Inst Salud Carlos III, CIBER Fisiol Obesidad & Nutr CIBERobn, Barcelona, Spain
[3] Kings Coll London, Inst Psychiat, London WC2R 2LS, England
[4] Univ Barcelona, Sch Med, Dept Clin Sci, Barcelona, Spain
[5] Univ Autonoma Barcelona, Dept Psicobiol & Metodol, Lab Estadist Aplicada, E-08193 Barcelona, Spain
[6] Med Univ Vienna, Dept Child & Adolescent Psychiat, Vienna, Austria
[7] Inst Salud Carlos III, CIBER Salud Mental CIBERSAM, Barcelona, Spain