1. Section of Emergency Medicine, Department of Pediatrics, University of Colorado Anschutz Medical Campus, Children’s Hospital Colorado, Aurora, CO, USA
2. Departments of Emergency Medicine and Medical Toxicology, St. Luke's University Health Network, Bethlehem, PA, USA
3. En route Care Research Center, Lackland AFB, San Antonio, TX, USA
4. MedTox Laboratories, Laboratory Corporation of America Holdings, Saint Paul, MN, USA
5. Department of Emergency Medicine, University of Colorado Anschutz Medical Campus, University of Colorado Hospital, Aurora, CO, USA