1. Department of Surgery, University of Maryland School of Medicine, Baltimore, MD, USA
2. Department of Emergency Medicine, University of North Carolina School of Medicine, Chapel Hill, NC, USA
3. Department of Mathematics and Statistics, Air Force Institute of Technology Wright-Patterson Air Force Base, Ohio
4. Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
5. Department of Medicine, Lehigh Valley Health Network, Allentown, PA, USA