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Continue to ChatWhat causes autism? As far as we know in 2013, there is no single gene or single environmental factor that accounts for the more than 1 million Americans with ASDs. - Thomas R. Insel from https://whatsmyquote.com/quote/what-causes-autism-as-far-as-we-know-in-2013-there-is-no-single-gene-or-single-environmental-factor-that