REPORT FROM THE AMERICAN ACADEMY OF NEUROLOGY (AAN) ANNUAL MEETING, SAN DIEGO, CA, MARCH 16-23, 2013 -High sodium chloride levels promote the differentiation of proinflammatory Th17 cells that are highly pathogenic, according to the preliminary results of an in vitro study in naïve human  CD4+ cells (Kleinewietfeld et al. AAN 2013; abstract S11.004).