1. Division of Pediatric Critical Care, Departments of Pediatrics and
2. Critical Care Medicine and The Clinical Research, Investigation, and Systems Modeling of Acute Illness Center, School of Medicine and
3. Departments of Pediatrics,
4. Emergency Medicine, and
5. Division of Critical Care and Department of Pediatrics, National Emergency Medical Services for Children Data Analysis Resource Center, School of Medicine, The University of Utah, Salt Lake City, Utah;
6. Emergency Medicine and Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California;
7. Department of Emergency Medicine, Harbor–University of California, Los Angeles Medical Center, Torrance, California; and
8. Los Angeles County Emergency Medical Services Agency, Santa Fe Springs, California
9. Department of Health Policy and Management, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania;