title: Allergen standardization. Introduction.
mesh_terms: D000485:Allergens / Q000032:analysis; D000939:Epitopes / Q000032:analysis; D006801:Humans; D007120:Immunochemistry; D005779:Immunodiffusion; D007962:Leukocytes / Q000276:immunology; D009584:Nitrogen / Q000032:analysis; D011506:Proteins / Q000032:analysis
chemical_list: D000485:Allergens; D000939:Epitopes; D011506:Proteins; D009584:Nitrogen