title: Delayed hypersensitivity and allergic rhinitis. A negative study.
mesh_terms: D000328:Adult; D002744:Chlorpheniramine; D006634:Histamine H1 Antagonists; D006801:Humans; D006968:Hypersensitivity, Delayed / Q000276:immunology*; D010936:Plant Extracts; D011058:Pollen; D006255:Rhinitis, Allergic, Seasonal / Q000276:immunology*; D012882:Skin Tests
chemical_list: D006634:Histamine H1 Antagonists; D010936:Plant Extracts; D002744:Chlorpheniramine