1. Department of Health Behavior and Health Education University of Michigan Ann Arbor MI USA
2. Firearm Injury & Policy Research Program Harborview Injury Prevention & Research Center University of Washington Seattle WA USA
3. Psychiatry & Behavioral Sciences University of Washington Seattle WA USA
4. Massachusetts General Hospital Cancer Center Protocol Office Boston MA USA
5. School of Social Work University of Washington Seattle WA USA
6. Department of Pediatrics University of Washington Seattle WA USA
7. Department of Epidemiology University of Washington Seattle WA USA