1. Department of Epidemiology, University of Washington, Seattle, WA, USA
2. Firearm Injury & Policy Research Program, Harborview Injury Prevention & Research Center, University of Washington, Seattle, WA, USA
3. Division of Violence Prevention, National Center for Injury Prevention and Control, Centers for Disease Control and Prevention, Atlanta, GA, USA
4. Department of Pediatrics, University of Washington, Seattle, WA, USA