title: ATS guidelines for methacholine and exercise challenge testing.
authors.forename: V
authors.initials: V
authors.lastname: Popa
mesh_terms: D016085:Bronchoconstrictor Agents; D005080:Exercise Test; D006801:Humans; D016210:Methacholine Chloride; D017410:Practice Guidelines as Topic
chemical_list: D016085:Bronchoconstrictor Agents; D016210:Methacholine Chloride