The Effect of Maternal Smoking during Pregnancy on Intellectual Disabilities among 8-Year Old Children.

¹University of North Carolina at Chapel Hill, Department of Epidemiology, Chapel Hill, NC, United States, ²University of Utah, Department of Psychiatry, Salt Lake City, UT, United States,³ Medical University of South Carolina, Department of Medicine, Division of Biostatistics and Epidemiology, Department of Neurosciences, Charleston, SC, United States.