1. Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana
2. Department of Surgery, SUNY Upstate Medical University, Syracuse, New York
3. Department of Anesthesiology and Critical Care and
4. Department of Radiology, University of Pennsylvania, Philadelphia, Pennsylvania
5. R Adams Cowley Shock Trauma Center, University of Maryland, Baltimore, Maryland; and
6. Department of Medicine, University of Vermont, Burlington, Vermont