title: Use of two inert gases to measure functional residual capacity.
mesh_terms: D000704:Analysis of Variance; D006371:Helium; D008722:Methods; D009584:Nitrogen; D010100:Oxygen; D010101:Oxygen Consumption; D013147:Spirometry
chemical_list: D006371:Helium; D009584:Nitrogen; D010100:Oxygen