What The Study Did: National registry data from five countries (Denmark, Finland, Sweden, Israel and Western Australia) were used to estimate the contribution of various genetic and nongenetic factors on the risk of autism spectrum disorder in this population-based study.
Authors: Sven Sandin, Ph.D., of the Karolinska Institutet in Stockholm, Sweden, is the corresponding author.
(doi:10.1001/jamapsychiatry.2019.1411)
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JAMA Psychiatry