Are rates of autism spectrum disorders increasing? Expanded diagnostic criteria and greater public awareness may explain why.
D000293:Adolescent; D001364:Awareness; D002648:Child; D002659:Child Development Disorders, Pervasive / Q000175:diagnosis* / Q000453:epidemiology*; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D006306:Health Surveys; D006801:Humans; D015994:Incidence; D014481:United States