Nikolov, RN, et al, Gastrointestinal symptoms in a sample of children with pervasive developmental disorders.

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DeFelice ML, et al. Intestinal cytokines in children with pervasive developmental disorders.

FORBES: Anti-Vaccine Activists Apparently Immune To Science

Those investigators found no link between chlorpyrifos and endpoints that were similar to those of 2006 study, but did identify an association between another chemical and pervasive developmental disorders (again, not diagnosed autism).

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