title: On the expectorant action of cholinergic drugs.
authors.forename: M S
authors.initials: MS
authors.lastname: LAPP
authors.forename: E M
authors.initials: EM
authors.lastname: BOYD
mesh_terms: D002794:Choline; D018678:Cholinergic Agents; D005100:Expectorants; D006801:Humans
chemical_list: D018678:Cholinergic Agents; D005100:Expectorants; D002794:Choline