title: Re-appraisal of helium-oxygen therapy on patients with chronic lung disease.
mesh_terms: D002245:Carbon Dioxide / Q000097:blood; D002908:Chronic Disease; D006371:Helium; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008173:Lung Diseases, Obstructive / Q000628:therapy*; D009584:Nitrogen; D010100:Oxygen / Q000097:blood; D010101:Oxygen Consumption; D011175:Positive-Pressure Respiration; D012123:Pulmonary Ventilation; D012129:Respiratory Function Tests; D012138:Respiratory Therapy
chemical_list: D002245:Carbon Dioxide; D006371:Helium; D009584:Nitrogen; D010100:Oxygen