title: Serological studies of phenotypically HL-A-identical unrelated subjects.
mesh_terms: D006649:Histocompatibility Antigens; D006801:Humans; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000276:immunology*; D010641:Phenotype; D012703:Serotyping
chemical_list: D006649:Histocompatibility Antigens