title: Changing secretion patterns of background plaque-forming cells as a function of age.
mesh_terms: D000375:Aging; D000818:Animals; D000921:Antibody-Producing Cells / Q000276:immunology*; D000941:Antigens; D002470:Cell Survival; D004912:Erythrocytes / Q000276:immunology; D005260:Female; D006207:Half-Life; D006462:Hemolytic Plaque Technique; D008297:Male; D051379:Mice; D012756:Sheep / Q000097:blood; D013154:Spleen / Q000166:cytology / Q000276:immunology
chemical_list: D000941:Antigens