title: The correct methacholine challenge delivery method?
authors.forename: Robert G
authors.initials: RG
authors.lastname: Townley
authors.forename: Russell J
authors.initials: RJ
authors.lastname: Hopp
authors.forename: Richard R
authors.initials: RR
authors.lastname: Rosenthal
mesh_terms: D001985:Bronchial Provocation Tests / Q000295:instrumentation / Q000379:methods*; D016085:Bronchoconstrictor Agents / Q000008:administration & dosage*; D006801:Humans; D016210:Methacholine Chloride / Q000008:administration & dosage*
chemical_list: D016085:Bronchoconstrictor Agents; D016210:Methacholine Chloride