title: GOLD and the fixed ratio.
authors.forename: J
authors.initials: J
authors.lastname: Vestbo
authors.forename: R
authors.initials: R
authors.lastname: Rodriguez-Roisin
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017410:Practice Guidelines as Topic; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis*; D012955:Societies, Medical