1. University of California – Los Angeles, Department of Emergency Medicine, Los Angeles, California; David Geffen School of Medicine at UCLA, Department of Emergency Medicine, Los Angeles, California
2. University of California – Los Angeles, Department of Emergency Medicine, Los Angeles, California
3. University of California – Los Angeles, Department of Emergency Medicine, Los Angeles, California; David Geffen School of Medicine at UCLA, Department of Emergency Medicine, Los Angeles, California; Greater Los Angeles VA Healthcare System, Department of Emergency Medicine, Los Angeles, California
4. David Geffen School of Medicine at UCLA, Department of Emergency Medicine, Los Angeles, California; Greater Los Angeles VA Healthcare System, Department of Emergency Medicine, Los Angeles, California