1. Department of Pediatrics, Section of Emergency Medicine, Baylor College of Medicine, Houston, Texas;
2. Department of Pediatrics, Columbia University College of Physicians and Surgeons, New York, New York;
3. Department of Pediatrics, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania;
4. Division of Emergency Medicine, Department of Pediatrics, School of Medicine, University of Washington, and Seattle Children’s Hospital, Seattle, Washington;
5. Department of Pediatrics, School of Medicine, University of Missouri, Kansas City, Missouri;
6. Department of Emergency Medicine, University of Michigan Medical School, Ann Arbor, Michigan; and
7. Department of Pediatrics, School of Medicine, Yale University, New Haven, Connecticut