Correction.

The article presents corrections to several papers that were published in different issues of the journal "Proceedings of the National Academy of Sciences of the USA." One of the article "Glatiramer Acetate-Specific T Cells in the Brain Express T helper 2/3 Cytokines and Brain-Derived Neurotrophic Factor In Situ," by Rina Aharoni, Basak Kayhan, Raya Eilam, Michael Sela, and Ruth Arnon appeared in November 25, 2003 issue of the journal. Another article "Suppression of Myasthenogenic Responses of a T Cell Line by a Dual Altered Peptide Ligand by Induction of CD4 and CD25 Regulatory Cells," by Badiga Venkata Aruna, Michael Sela, and Edna Mozes appeared in the July 19, 2005 issue of the journal.