1. Department of Surgery, Upstate Medical University, Syracuse, NY 13210, USA
2. Departments of Anesthesia, Radiology and Biomedical Engineering, University of Iowa, Iowa City, IA 52242, USA
3. Department of Medicine, R Adams Cowley Shock Trauma Center, University of Maryland Medical Center, Baltimore, MD 21201, USA
4. Department of Medicine, Upstate Medical University, Syracuse, NY 13210, USA
5. Brody School of Medicine, Department of Internal Medicine, East Carolina University, Greenville, NC 27834, USA
6. Department of Adult Critical Care, Guy’s and St Thomas’ NHS Foundation Trust, King’s Partners, St Thomas’ Hospital, London SE1 7EH, UK
7. Department of Biomedical Engineering, University of Iowa, Iowa City, IA 52242, USA