1. *Center for Shock, Trauma and Anesthesiology Research, University of Maryland School of Medicine, Baltimore, MD
2. †Department of Anesthesia, Pain Management & Perioperative Medicine, Dalhousie University, Halifax, NS, Canada
3. ‡Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, TX
4. §Department of Medicine, University of Maryland School of Medicine, Baltimore, MD
5. ¶Enroute Care Division, Department of Aeromedical Research, U.S. Air Force School of Aerospace Medicine, Wright Patterson Air Force Base, Dayton, OH