title: [Back to the earlier GOLD classification I-IV?].
authors.affiliation: , Schlossstr. 5, D-13507, Berlin, Deutschland. hering@t-online.de.
authors.forename: Thomas
authors.initials: T
authors.lastname: Hering
mesh_terms: D018450:Disease Progression; D005858:Germany; D006801:Humans; D008487:Medical History Taking; D029424:Pulmonary Disease, Chronic Obstructive / Q000145:classification* / Q000175:diagnosis; D011788:Quality of Life; D012955:Societies, Medical
keywords: COPD; GOLD classification; exacerbation risk