1 Harborview Injury Prevention and Research Center, University of Washington School of Medicine, Seattle, WA 98104, USA. Electronic address: vavilala@uw.edu.
2 Harborview Injury Prevention and Research Center, University of Washington School of Medicine, Seattle, WA 98104, USA; Shock Trauma and Anesthesiology Research Center, University of Maryland School of Medicine, R Adams Cowley Shock Trauma Center, Baltimore MD, USA.