title: The effect of intradermal and subcutaneous route of administration on variation in PPD sensitivity.
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007271:Injections, Intradermal; D007279:Injections, Subcutaneous; D014373:Tuberculin / Q000008:administration & dosage*; D014374:Tuberculin Test
chemical_list: D014373:Tuberculin