1 Firearm Injury Prevention Initiative, School of Medicine; Injury and Violence Prevention Center, Colorado School of Public Health; and Division of Hospital Medicine, School of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado.
2 Department of Health Policy and Management, Harvard School of Public Health, Harvard Injury Control Research Center, Boston, Massachusetts.
3 Department of Health Sciences and Public Health, Bouvé College of Health Sciences, Northeastern University, Boston, Massachusetts.