La National Academy of Sciences et les Centres for Disease Control ont mené une méta-analyse dans le cadre de laquelle ils ont examiné tous les articles publiés sur la question. Il ne s'agissait pas d'une analyse sélective ou suggestive.
They have been demonstrated by other meta-analysis, done by the National Academy of Sciences and the Centres for Disease Control, that looked at all papers — not just a selective, biased analysis — and come to the conclusion that, in terms of registration of firearms, storage of firearms, and licensing, that there is no demonstrable beneficial effect from these laws.