title: Evaluation of DR antigens in blood donors in the Warsaw region.
mesh_terms: D001782:Blood Donors; D006684:HLA-DR Antigens; D006579:Heterozygote; D000949:Histocompatibility Antigens Class II; D006801:Humans; D011044:Poland
chemical_list: D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II