1. Rocky Mountain Poison and Drug Center, Denver Health and Hospital Authority, Denver, CO, USA;
2. Department of Emergency Medicine, University of Colorado, School of Medicine, Aurora, CO, USA;
3. Medical Toxicology and the Department of Emergency Medicine, San Antonio Military Medical Center, San Antonio, TX, USA;
4. Beckman Laser Institute, University of California, Irvine, Irvine, CA, USA;
5. USAF En Route Care Research Center, US Army Institute of Surgical Research, San Antonio, TX, USA;
6. Division of Pulmonary and Critical Care Medicine, Pennsylvania State University, College of Medicine, Hershey, PA, USA;
7. Department of Medicine, University of California, San Diego, La Jolla, CA, USA;
8. Laboratory Services Branch, Clinical Research Division, Wilford Hall Ambulatory Surgical Center, San Antonio, TX, USA