%0 Journal Article %T Increased interleukin 12 production in progressive multiple sclerosis: Induction by activated CD4 + T cells via CD40 ligand %A Balashov, Konstantin E. %A Smith, Derek R. %A Khoury, Samia J. %A Hafler, David A. %A Weiner, Howard L. %A , %J Proceedings of the National Academy of Sciences %@ 0027-8424 %D 1997-01-21 %I Proceedings of the National Academy of Sciences %~ DeepDyve