1. Department of Special Education, Department of Psychology, University of Georgia, Athens, GA, Department of Neurology, Medical College of Georgia, Augusta, GA
2. Center for the Study of Development and Learning, University of North Carolina, Chapel Hill, NC
3. Athens Magnetic Imaging, Athens, GA
4. Department of Psychology, University of Georgia, Athens, GA
5. Department of Psychiatry, University of Florida School of Medicine, Gainesville, FL