1. Department of Emergency Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA;
2. Ramathibodi Poison Center, Division of Clinical Pharmacology and Toxicology, Department of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand;
3. Hawaii Department of Health, Emergency Medical Services Injury Prevention System Branch, Honolulu, HI, USA;
4. Denver Health and Hospital Authority, Rocky Mountain Poison and Drug Center, Denver, CO, USA;
5. Department of Emergency Medicine, University of Colorado School of Medicine at Anschutz Medical Center, Aurora, CO, USA