title: Measurement of circulating ragweed antigen.
authors.forename: M C
authors.initials: MC
authors.lastname: JOHNSON
authors.forename: H L
authors.initials: HL
authors.lastname: ALEXANDER
mesh_terms: D031164:Ambrosia; D000707:Anaphylaxis; D000941:Antigens; D001699:Biometry; D006967:Hypersensitivity; D007154:Immune System Diseases; D006255:Rhinitis, Allergic, Seasonal / Q000453:epidemiology* / Q000706:statistics & numerical data*
chemical_list: D000941:Antigens