title: Safety of methacholine challenges in a multicenter pediatric asthma study.
authors.forename: Ronina A
authors.initials: RA
authors.lastname: Covar
authors.forename: Ryan
authors.initials: R
authors.lastname: Colvin
authors.forename: Gail
authors.initials: G
authors.lastname: Shapiro
authors.forename: Robert
authors.initials: R
authors.lastname: Strunk
mesh_terms: D018927:Anti-Asthmatic Agents / Q000627:therapeutic use*; D001249:Asthma / Q000139:chemically induced / Q000150:complications / Q000175:diagnosis* / Q000188:drug therapy; D016535:Bronchial Hyperreactivity / Q000139:chemically induced* / Q000188:drug therapy / Q000209:etiology; D001985:Bronchial Provocation Tests; D016085:Bronchoconstrictor Agents; D002648:Child; D006801:Humans; D016210:Methacholine Chloride; D015337:Multicenter Studies as Topic; D016032:Randomized Controlled Trials as Topic; D016896:Treatment Outcome
chemical_list: D018927:Anti-Asthmatic Agents; D016085:Bronchoconstrictor Agents; D016210:Methacholine Chloride