1. Department of Pediatrics, Johns Hopkins School of Medicine, Baltimore, Maryland;
2. Department of Pediatrics, Medical University of South Carolina, Charleston, South Carolina;
3. American Academy of Pediatrics, Elk Grove Village, Illinois;
4. Department of Pediatrics, University of Vermont College of Medicine, Burlington, Vermont;
5. Department of Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana; and
6. Department of Neurology and Developmental Medicine, Kennedy Krieger Institute, Baltimore, Maryland