Prevalence and Interpretation of Recent Trends in Rates of Pervasive Developmental Disorders

Abstract

The aims of this article are to provide an up-to-date review of the methodological features and substantive results of published epidemiological surveys of the prevalence of pervasive developmental disorders (PDD). This article updates previous reviews (1, 2) with the inclusion of new studies made available since then. The specific questions addressed… (More)

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