1. Department of Emergency Medicine, Stanford University School of Medicine, 900 Welch Road Suite 350, Palo Alto, CA 94304, USA
2. Department of Emergency Medicine, Brigham and Women’s Hospital, 75 Francis Street, Boston, MA 02115, USA
3. Genentech, Inc., South San Francisco, CA 94080, USA
4. Department of Emergency Medicine, North Shore Medical Center, 3 Dove Avenue, Salem, MA 01970, USA
5. Department of Anesthesia and Intensive Care Medicine, University Hospital Bonn, Venusberg-Campus 1, Bonn 53127, Germany
6. Department of Medicine, Cardiovascular Division, Brigham and Women’s Hospital, 75 Francis Street, Boston, MA 02115, USA