title: Lung cancer is more common in early GOLD stages of COPD: a spurious association?
authors.forename: Kwok Chiu
authors.initials: KC
authors.lastname: Chang
authors.forename: Chi Chiu
authors.initials: CC
authors.lastname: Leung
mesh_terms: D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000209:etiology*; D008297:Male; D029424:Pulmonary Disease, Chronic Obstructive / Q000150:complications*