title: Effect of thymus implants and thymus humoral factor on tolerance induction in ducks.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D000921:Antibody-Producing Cells; D004372:Ducks / Q000276:immunology*; D007108:Immune Tolerance; D007111:Immunity, Cellular; D008213:Lymphocyte Activation; D016038:Skin Transplantation; D013601:T-Lymphocytes / Q000276:immunology; D013950:Thymus Gland / Q000276:immunology*; D014020:Tissue Extracts / Q000276:immunology; D014184:Transplantation, Homologous
chemical_list: D014020:Tissue Extracts