title: International units.
authors.forename: P S
authors.initials: PS
authors.lastname: Norman
mesh_terms: D000485:Allergens / Q000008:administration & dosage / Q000592:standards*; D000818:Animals; D006801:Humans; D007391:International Cooperation; D011786:Quality Control; D012882:Skin Tests / Q000592:standards*
chemical_list: D000485:Allergens