title: Grass pollen hyposensitization versus placebo therapy.
mesh_terms: D000485:Allergens / Q000592:standards; D002986:Clinical Trials as Topic; D003888:Desensitization, Immunologic; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D010919:Placebos; D011058:Pollen / Q000276:immunology*; D006255:Rhinitis, Allergic, Seasonal / Q000628:therapy*; D013223:Statistics as Topic
chemical_list: D000485:Allergens; D010919:Placebos