title: The human Ia system: an overview.
mesh_terms: D000911:Antibodies, Monoclonal; D005786:Gene Expression Regulation; D000949:Histocompatibility Antigens Class II / Q000235:genetics / Q000276:immunology; D006801:Humans; D009369:Neoplasms / Q000276:immunology; D011110:Polymorphism, Genetic; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D000911:Antibodies, Monoclonal; D000949:Histocompatibility Antigens Class II