title: Anti-P1 hemagglutinins in pigeon-breeders naturally immunized to pigeon dust.
mesh_terms: D000818:Animals; D001789:Blood Group Antigens / Q000276:immunology*; D010856:Columbidae; D004391:Dust; D006388:Hemagglutinins / Q000276:immunology*; D006801:Humans; D010127:P Blood-Group System / Q000276:immunology*
chemical_list: D001789:Blood Group Antigens; D004391:Dust; D006388:Hemagglutinins; D010127:P Blood-Group System