title: Effect of helium on maximal expiratory flow in patients with asthma.
mesh_terms: D000403:Airway Resistance / Q000187:drug effects*; D001249:Asthma / Q000503:physiopathology*; D006371:Helium / Q000494:pharmacology*; D006801:Humans; D008448:Maximal Expiratory Flow Rate
chemical_list: D006371:Helium