We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleInterleukin-21 is a T-helper cytokine that regulates humoral immunity and cell-mediated anti-tumour responses.AuthorsSivakumar PV; Foster DC; Clegg CHPublicationImmunology, 2004, Vol 112, Issue 2, p177ISSN0019-2805Publication typearticleDOI10.1111/j.1365-2567.2004.01886.x