1 Department of Anesthesiology and Pain Medicine, University of Washington, Seattle, WA, and Harborview Injury Prevention and Research Center, University of Washington, Seattle, WA; Department of Epidemiology, School of Public Health, Harborview Injury Prevention and Research Center, University of Washington, Seattle, WA, and Department of Epidemiology, University of Washington, Seattle, WA; Department of Anesthesiology and Pain Medicine, University of Washington, Seattle, WA; Harborview Injury Prevention and Research Center, University of Washington, Seattle, WA, and Department of Anesthesiology, Duke University, Durham, NC; Department of Anesthesiology and Pain Medicine, University of Washington, Seattle, WA, and Harborview Injury Prevention and Research Center, University of Washington, Seattle, WA.