1. Department of Emergency Medicine, Christiana Care, Doctors for Emergency Services , Newark, DE 19718, USA
2. Department of Emergency Medicine, Bundeswehr Central Hospital , Koblenz 56072, Germany
3. Department of Surgery, Uniformed Services University School of Medicine , Bethesda, MD 20814, USA
4. Department of Emergency Medicine, University of Pennsylvania Health System, Penn Presbyterian Medical Center , Philadelphia, PA 19104, USA
5. Joint Trauma System, Defense Health Agency , Joint Base San Antonio Fort Sam Houston, TX 78234, USA