Academic Department of Military Surgery and Trauma, Royal Centre for Defence Medicine, Birmingham, UK; and University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK. Warwick Medical School, University of Warwick, Coventry, UK; and Academic Department of Anaesthesia, Critical Care, Pain and Resuscitation, Heartlands Hospital, University Hospital Birmingham NHS Foundation Trust, Birmingham, UK Academic Department of Military General Practice, Royal Centre for Defence Medicine, Birmingham, UK Academic Department of Military General Practice, Royal Centre for Defence Medicine, Birmingham, UK Academic Department of Military General Practice, Royal Centre for Defence Medicine, Birmingham, UK US Army Institute of Surgical Research, San Antonio, TX; and Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, MD Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, MD; and Division of Trauma, Scripps Mercy Hospital, San Diego, CA Centre of Defence Pathology, Royal Centre for Defence Medicine, Birmingham, UK Academic Department of Military Anaesthesia and Critical Care, Royal Centre for Defence Medicine, Birmingham, UK.