title: Problems in the standardization of allergenic extracts in the U.S.
authors.forename: H
authors.initials: H
authors.lastname: Baer
mesh_terms: D000485:Allergens / Q000302:isolation & purification / Q000592:standards*; D000818:Animals; D006801:Humans; D012015:Reference Standards; D014481:United States; D014486:United States Food and Drug Administration
chemical_list: D000485:Allergens