title: [Studies on duplicate pollen sensitization].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000485:Allergens / Q000276:immunology*; D002648:Child; D002675:Child, Preschool; D004391:Dust; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D006109:Poaceae; D011058:Pollen / Q000276:immunology*; D012221:Rhinitis, Allergic, Perennial / Q000276:immunology*; D006255:Rhinitis, Allergic, Seasonal / Q000276:immunology*; D014197:Trees
chemical_list: D000485:Allergens; D004391:Dust