title: Antigen-specific suppressor ("blocking") factors in tumor immunity.
mesh_terms: D000818:Animals; D000936:Antigen-Antibody Complex; D000951:Antigens, Neoplasm / Q000276:immunology*; D006801:Humans; D007108:Immune Tolerance; D007111:Immunity, Cellular; D009369:Neoplasms / Q000276:immunology*; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*
chemical_list: D000936:Antigen-Antibody Complex; D000951:Antigens, Neoplasm