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South Carolina Autism Developmental Disabilities Monitoring Study Area (SC ADDM). Light gray area represents the entire SC ADDM surveillance area. Dark gray area represents the three-county sub-region used in this analysis.
Reprinted from Nicholas JS, Carpenter LA, King LB, Jenner W, Charles J. Autism spectrum disorders in preschool aged children: prevalence and comparison to a school aged population. Annals of Epidemiology 19:808–814, 2009, with permission from Elsevier.
