title: The HL-A system: antigenic heterogeneity and four new antigens.
mesh_terms: D000483:Alleles; D015478:Antigens, Heterophile; D003168:Complement Fixation Tests; D003429:Cross Reactions; D003601:Cytotoxicity Tests, Immunologic; D000939:Epitopes; D005787:Gene Frequency; D005799:Genes, Dominant; D005838:Genotype; D006649:Histocompatibility Antigens; D007106:Immune Sera; D010375:Pedigree; D011110:Polymorphism, Genetic
chemical_list: D015478:Antigens, Heterophile; D000939:Epitopes; D006649:Histocompatibility Antigens; D007106:Immune Sera