title: Term ambiguity.
authors.forename: Thomas L
authors.initials: TL
authors.lastname: Petty
mesh_terms: D016535:Bronchial Hyperreactivity / Q000175:diagnosis*; D005540:Forced Expiratory Flow Rates; D006801:Humans; D016210:Methacholine Chloride; D012129:Respiratory Function Tests; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index; D014797:Vital Capacity
chemical_list: D016210:Methacholine Chloride