1. Harborview Injury Prevention and Research Center, University of Washington, Seattle, Washington, USA.
2. Department of Child, Family, and Population Health Nursing, School of Nursing, University of Washington, Seattle, Washington, USA.
3. Department of Anesthesiology and Pain Medicine, School of Medicine, University of Washington, Seattle, Washington, USA.
4. Division of Pediatric Critical Care Medicine, Department of Pediatrics, University of Washington, Seattle, Washington, USA.
5. School of Social Work, University of Washington, Seattle, Washington, USA.