title: Immunology. A chronic need for IL-21.
authors: Laboratory Medicine and Pathology, Center for Immunology, University of Minnesota, Minneapolis, MN 55455, USA.
authors: Lisa D S
authors: LD
authors: Johnson
authors: Stephen C
authors: SC
authors: Jameson
mesh_terms: D000818:Animals; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology*; D002908:Chronic Disease; D007378:Interleukins / Q000276:immunology*; D051379:Mice; D014777:Virus Diseases / Q000276:immunology*; D000098546:Interleukin-21
chemical_list: D007378:Interleukins; D000098546:Interleukin-21