title: Hypercapnia in cases of chronic obstructive lung disease.
mesh_terms: D005081:Exercise Therapy; D006801:Humans; D006935:Hypercapnia / Q000209:etiology*; D000860:Hypoxia / Q000209:etiology; D008173:Lung Diseases, Obstructive / Q000150:complications* / Q000628:therapy; D010102:Oxygen Inhalation Therapy