title: [Symptome variability in COPD].
authors.affiliation: Klinik für Lungen- und Bronchialmedizin, Klinikum Kassel.
authors.forename: Adrian
authors.initials: A
authors.lastname: Gillissen
mesh_terms: D000367:Age Factors; D003430:Cross-Sectional Studies; D003937:Diagnosis, Differential; D004417:Dyspnea / Q000209:etiology; D005858:Germany; D006801:Humans; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis* / Q000453:epidemiology / Q000209:etiology; D012893:Sleep Wake Disorders / Q000175:diagnosis* / Q000453:epidemiology / Q000209:etiology