title: A simple benzidine test for occult blood in feces.
authors.forename: M B
authors.initials: MB
authors.lastname: LEVIN
authors.forename: J Y C
authors.initials: JY
authors.lastname: WATT
mesh_terms: D001560:Benzidines; D005243:Feces / Q000097:blood*; D006471:Gastrointestinal Hemorrhage; D006801:Humans; D009780:Occult Blood
chemical_list: D001560:Benzidines; C029876:benzidine
keywords: FECES/blood in