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Autism Mostly Caused by Environmental Factors, Stanford Study Finds

A Stanford University School of Medicine Study done on twin pairs finds that environmental factors play a much larger role in autism development than genetic factors, as opposed to earlier findings.

A Stanford University School of Medicine study released Monday concludes that environmental factors have a much greater contribution to autism than originally thought, according to a co-author of the study.

“This is the largest ever done to date on autism,” said Lisa Croen, Ph.D., co-author of the study and a senior research scientist and director of the Autism Research Program at Kaiser Permanente.

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