title: Skin testing for tuberculosis. Antigen and observer variability.
mesh_terms: D000907:Antibodies, Bacterial / Q000032:analysis; D000941:Antigens / Q000008:administration & dosage; D002986:Clinical Trials as Topic; D004781:Environmental Exposure; D005188:False Negative Reactions; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008722:Methods; D013997:Time Factors; D014374:Tuberculin Test; D014397:Tuberculosis, Pulmonary / Q000175:diagnosis / Q000276:immunology
chemical_list: D000907:Antibodies, Bacterial; D000941:Antigens