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3. Pediatric data (age 0-19 years) for years 2009-2011. Data courtesy National Trauma Data Bank, American College of Surgeons, Chicago, IL. Provided by special request.
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5. Follman M, Aronsen G, Pan D. “A guide to mass shootings in America”. Mother Jones Available at: http://www.motherjones.com/politics/2012/07/mass-shootings-map.). Accessed February 23, 2013.