title: [Introduction. Chronic obstructive pulmonary disease].
authors.affiliation: Servicio de Neumología, Instituto del Tórax, Hospital Clínic, Barcelona, España. alvar.agusti@clinic.ub.es
authors.forename: Alvar
authors.initials: A
authors.lastname: Agustí
mesh_terms: D006801:Humans; D029424:Pulmonary Disease, Chronic Obstructive