1. Department of Emergency Medicine, School of Medicine, University of California, Irvine, CA 92697, USA
2. School of Medicine, University of California, Irvine, CA 92697, USA
3. College of Osteopathic Medicine of the Pacific, Western University, Pomona, CA 91766, USA
4. Department of Emergency Medicine, Eisenhower Health, Rancho Mirage, CA 92270, USA
5. Department of Emergency Medicine, Kingman Regional Medical Center, Kingman, AZ 86409, USA
6. Department of Emergency Medicine, Kaiser Permanente, Irvine, CA 92618, USA