Correct citation: Walker SJ, Segal J, Aschner M. Cultured lymphocytes from autistic children and non-autistic siblings up-regulate heat shock protein RNA in response to thimerosal challenge. Neurotoxicology. 2006 Sep;27(5):685-92. Epub 2006 Jun 16.
An in-vitro cell study, thimerosal (no longer used in U.S. childhood vaccines except for some influenza vaccines), using concentrations higher than formerly found in vaccines.