title: Discordance between tuberculin skin test results with two commercial purified protein derivative preparations.
authors.forename: M E
authors.initials: ME
authors.lastname: Rupp
authors.forename: A W
authors.initials: AW
authors.lastname: Schultz
authors.forename: J C
authors.initials: JC
authors.lastname: Davis
mesh_terms: D001426:Bacterial Proteins / Q000302:isolation & purification; D005189:False Positive Reactions; D006801:Humans; D014374:Tuberculin Test; D014376:Tuberculosis / Q000175:diagnosis* / Q000453:epidemiology
chemical_list: D001426:Bacterial Proteins