Standardization of antigens.
D000485:Allergens / Q000592:standards; D000542:Alveolitis, Extrinsic Allergic / Q000276:immunology*; D000941:Antigens / Q000592:standards*; D010936:Plant Extracts / Q000276:immunology; D011014:Pneumonia / Q000276:immunology*
D000485:Allergens; D000941:Antigens; D010936:Plant Extracts