Respiratory muscle strength in chronic obstructive pulmonary disease.
D003964:Diaphragm / Q000503:physiopathology*; D006801:Humans; D007320:Inspiratory Capacity; D007366:Intercostal Muscles / Q000503:physiopathology*; D008173:Lung Diseases, Obstructive / Q000503:physiopathology*; D008448:Maximal Expiratory Flow Rate