The Ex Vivo Production of IL-6 and IL-21 by CD4(+) T Cells is Directly Associated with Neurological Disability in Neuromyelitis Optica Patients. Linhares UC, Schiavoni PB, Barros PO, Kasahara TM, Teixeira B, Ferreira TB, Alvarenga R, Hygino J, Vieira MMM, Bittencourt V CB, et al. J Clin Immunol. 2012 Sep 5. Epub 2012 Sep 05. PMID: 22948743. Abstract CommentRecommendBookmarkWatch