title: Single-breath helium dilution method in obstructive lung disease.
mesh_terms: D001944:Breath Tests / Q000379:methods*; D006371:Helium; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000503:physiopathology*; D008176:Lung Volume Measurements; D014109:Total Lung Capacity
chemical_list: D006371:Helium