NICKEL, W F Studies on several cholinergic drugs as possible etiologic agents in ulcerative colitis. [electronic resource] - Gastroenterology Aug 1953 - 556-9 p. digital Publication Type: Journal Article ISSN: 0016-5085 Subjects--Topical Terms: Acetylcholine--pharmacologyCholinergic AgentsColitisColitis, UlcerativeHumansMethacholine Chloride--pharmacology