Shifting diagnoses and heightened awareness explain only part of the apparent rise in autism. Scientists are struggling to explain the rest.
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Karen Weintraub is a freelance writer in Cambridge, Massachusetts.
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Weintraub, K. The prevalence puzzle: Autism counts. Nature 479, 22–24 (2011). https://doi.org/10.1038/479022a
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DOI: https://doi.org/10.1038/479022a
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