1. Department of Epidemiology and Biostatistics, University of South Carolina, Columbia, USA
2. Department of Pediatrics, University of South Florida, Tampa, USA
3. Department of Neurology & Department of Pediatrics, University of Rochester Medical Center, Rochester, New York, USA
4. Department of Psychiatry, University of Florida College of Medicine – Jacksonville, USA
5. Division of Human Development and Disability, Centers for Disease Control and Prevention, Atlanta, Georgia, USA