title: Unexplained appearance of antibody in an Rh null  donor.
mesh_terms: D000743:Anemia, Hemolytic / Q000276:immunology; D003241:Consanguinity; D003298:Coombs Test; D005838:Genotype; D006801:Humans; D007518:Isoantibodies / Q000032:analysis*; D008297:Male; D008875:Middle Aged; D010375:Pedigree; D012204:Rh-Hr Blood-Group System
chemical_list: D007518:Isoantibodies; D012204:Rh-Hr Blood-Group System