[1] Inst Catala Salut, Gerencia Terr Barcelona, Barcelona, Spain
[2] Fundacio Inst Univ Recerca Atencio Primaria Salut, Barcelona, Spain
[3] Univ Autonoma Barcelona, Dept Pediat Obstet & Ginecol & Med Prevent, Bellaterra, Cerdanyola Vall, Spain
[4] Inst Catala Salut, Primary Healthcare Ctr Passeig St Joan, Barcelona, Spain