1. EMS Division, Department of Emergency Medicine, Beth Israel Deaconess Medical Center & Harvard Medical School, Boston, Massachusetts
2. Department of Molecular Microbiology & Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
3. Department of Anesthesiology, University of Maryland School of Medicine & R. Adams Cowley Shock Trauma Center, Baltimore, Maryland
4. Barts and The London School of Medicine & Dentistry, Queen Mary University of London, London, UK