title: A test of tuberculin quality: tried and true or tired and tattered?
authors.forename: T F
authors.initials: TF
authors.lastname: Jones
authors.forename: W
authors.initials: W
authors.lastname: Schaffner
mesh_terms: D002983:Clinical Competence; D005189:False Positive Reactions; D006801:Humans; D011237:Predictive Value of Tests; D011786:Quality Control; D014373:Tuberculin; D014374:Tuberculin Test / Q000592:standards*; D014397:Tuberculosis, Pulmonary / Q000175:diagnosis*; D014944:World Health Organization
chemical_list: D014373:Tuberculin