1. Department of Emergency Medicine Boston Medical Center Boston Massachusetts USA
2. Boston University School of Medicine Boston Massachusetts USA
3. Quantitative Sciences Unit Stanford University School of Medicine Palo Alto California USA
4. Independent Scientist Palo Alto California USA
5. Department of Emergency Medicine Brigham and Women's Hospital Boston Massachusetts USA
6. Harvard Medical School Boston Massachusetts USA
7. Department of Emergency Medicine Massachusetts General Hospital Boston Massachusetts USA
8. Department of Emergency Medicine Stanford University School of Medicine Palo Alto California USA