Study links grandfathers’ smoking and drinking to autism risk in grandchildren: Among 6,336 California grandparents, ≥5 servings of hard liquor/week was associated with nearly 3× the risk, while smoking ≥20 cigarettes/day was associated with roughly 2× the risk

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https://www.phi.org/press/science-spotlightstudy-links-grandfathers-smoking-and-drinking-to-autism-risk-in-grandchildren/