1. Department of Pediatrics , University of California, Davis Health, University of California Davis, School of Medicine , Sacramento , USA
2. Division of Emergency Medicine, Department of Pediatrics , Nationwide Children’s Hospital, The Ohio State University School of Medicine , Columbus , USA
3. Division of Emergency Medicine, Department of Pediatrics , New York Presbyterian Morgan Stanley Children’s Hospital, Columbia University College of Physicians and Surgeons , New York , USA
4. Division of Emergency Medicine, Department of Pediatrics , St. Louis Children’s Hospital, Washington University School of Medicine in St. Louis , Saint Louis , USA
5. Division of Emergency Medicine, Department of Pediatrics , Children’s National Medical Center, The George Washington School of Medicine and Health Sciences , Washington DC , USA
6. Department of Pediatrics , University of Utah School of Medicine , Salt Lake City , USA
7. Division of Emergency Medicine, Department of Pediatrics , Ann and Robert H. Lurie Children’s Hospital of Chicago, Northwestern University Feinberg School of Medicine , Chicago , USA
8. Division of Emergency Medicine, Department of Pediatrics , Texas Children’s Hospital, Baylor College of Medicine , Houston , USA
9. Department of Emergency Medicine , University of California Davis Health, University of California Davis, School of Medicine , Sacramento , USA
10. Division of Emergency Medicine, Department of Pediatrics , The Colorado Children’s Hospital, University of Colorado-Denver School of Medicine , Denver , USA
11. Division of Emergency Medicine, Department of Pediatrics , Boston Children’s Hospital, Harvard Medical School , Boston , USA
12. Division of Emergency Medicine , Nemours/A.I. DuPont Hospital for Children, Sidney Kimmel Medical College at Thomas Jefferson University , Philadelphia , USA
13. Division of Emergency Medicine, Department of Pediatrics , Children’s Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania , Philadelphia , USA