title: Calf thymus fractions: enhancement and suppression of immunocompetent cells.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D000921:Antibody-Producing Cells; D002417:Cattle; D005260:Female; D006462:Hemolytic Plaque Technique; D051379:Mice; D011247:Pregnancy; D013154:Spleen / Q000166:cytology / Q000276:immunology*; D013950:Thymus Gland / Q000276:immunology*; D014020:Tissue Extracts / Q000494:pharmacology
chemical_list: D014020:Tissue Extracts