title: The ABCD of GOLD made clear.
authors.affiliation: University of Liverpool, Dept of Clinical Sciences, University Hospital Aintree, Liverpool, UK.
authors.forename: Peter M A
authors.initials: PM
authors.lastname: Calverley
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis* / Q000503:physiopathology*; D015272:Pulmonary Medicine / Q000592:standards*