1. Duke Clinical Research Institute, Durham, North Carolina, United States
2. Department of Pediatrics, Duke University School of Medicine, Durham, North Carolina, United States
3. Department of Pediatrics, University of Minnesota Masonic Children's Hospital, Minneapolis, Minnesota, United States
4. Department of Pediatrics, Our Lady of the Lake Regional Medical Center, Baton Rouge, Louisiana, United States
5. Department of Pediatrics, Riley Hospital for Children at Indiana University Health, Indianapolis, Indiana, United States
6. Departments of Pediatrics and Anesthesiology, Wake Forest School of Medicine, Winston-Salem, North Carolina, United States
7. Departments of Pediatrics, Arkansas Children's Hospital, Little Rock, Arizona, United States
8. Departments of Pediatrics, University of New Mexico, Albuquerque, New Mexico, United States
9. Departments of Pediatrics, MUSC Shawn Jenkins Children's Hospital, Charleston, South Carolina, United States
10. Departments of Pediatrics, Primary Children's Medical Center – University of Utah, Salt Lake City, Utah, United States
11. Department of Pediatrics, UH Rainbow Babies and Children's Hospital, Cleveland, Ohio, United States
12. Department of Pediatrics, University of Rochester, Rochester, New York, United States
13. Department of Pediatrics, University of Florida College of Medicine, Gainesville, Florida, United States
14. Department of Pediatrics, University of Utah, Salt Lake City, Utah, United States
15. Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
16. Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States