title: The respiratory muscles in COPD. State of the art.
mesh_terms: D003964:Diaphragm / Q000503:physiopathology; D004417:Dyspnea / Q000209:etiology / Q000503:physiopathology; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000503:physiopathology*; D009119:Muscle Contraction; D009132:Muscles / Q000503:physiopathology*; D012119:Respiration; D014939:Work of Breathing