title: Factors that contribute to inhibition of methacholine-induced bronchoconstriction.
mesh_terms: D001980:Bronchi / Q000187:drug effects*; D006801:Humans; D016210:Methacholine Chloride; D008688:Methacholine Compounds / Q000037:antagonists & inhibitors*
chemical_list: D008688:Methacholine Compounds; D016210:Methacholine Chloride