1. The David Geffen School of Medicine at UCLA, Los Angeles, California.
2. Department of Emergency Medicine, Harbor-UCLA Medical Center, Torrance, California.
3. Los Angeles Biomedical Research Institute, Torrance, California.
4. Department of Surgery, Division of Emergency Medicine, University of Utah School of Medicine, Salt Lake City, Utah.
5. Department of Internal Medicine, Division of Cardiology, Harbor-UCLA Medical Center, Torrance, California.
6. Department of Internal Medicine, Division of Infectious Disease, Harbor-UCLA Medical Center, Torrance, California.