title: The HLA system: biological and clinical importance.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D000939:Epitopes; D005815:Genetic Code; D006680:HLA Antigens / Q000145:classification / Q000235:genetics* / Q000276:immunology; D006801:Humans; D011110:Polymorphism, Genetic
chemical_list: D000939:Epitopes; D006680:HLA Antigens