[1] Hosp Santa Creu & Sant Pau, Dept Psychiat, Barcelona, Spain
[2] Hosp Clin San Carlos, Dept Psychiat, Madrid, Spain
[3] Complejo Hosp Univ, Hosp Meixoeiro, Dept Psychiat, Vigo, Spain
[4] Pfizer Spain, Med Unit, Dept Neurosci, Alcobendas, Madrid, Spain
[5] European Biometr Inst, Dept Biometr & Stat, Barcelona, Spain
[6] Pfizer Spain, Hlth Outcomes Res Dept, Med Unit, Alcobendas, Madrid, Spain