title: Chronic obstructive pulmonary disease in Poland - a need for population-based epidemiological studies.
authors.affiliation: gbrozek@sum.edu.pl.
authors.forename: Jan
authors.initials: J
authors.lastname: Zejda
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Brożek
mesh_terms: D016021:Epidemiologic Studies; D006801:Humans; D011044:Poland / Q000453:epidemiology; D029424:Pulmonary Disease, Chronic Obstructive / Q000453:epidemiology*