title: Definition of "strong" and "weak" histocompatibility alleles.
mesh_terms: D000483:Alleles; D000917:Antibody Formation; D000941:Antigens / Q000145:classification*; D006801:Humans; D016030:Kidney Transplantation; D013997:Time Factors; D014181:Transplantation Immunology
chemical_list: D000941:Antigens