title: Standardization of a PPD preparation in guinea-pigs and in man.
mesh_terms: D000818:Animals; D005260:Female; D005612:Freeze Drying; D006168:Guinea Pigs; D006801:Humans; D007279:Injections, Subcutaneous; D008297:Male; D011136:Polysorbates; D014373:Tuberculin / Q000494:pharmacology / Q000592:standards*; D014374:Tuberculin Test
chemical_list: D011136:Polysorbates; D014373:Tuberculin