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. Author manuscript; available in PMC: 2022 Jan 1.
Published in final edited form as: Epidemiology. 2021 Jan;32(1):36–45. doi: 10.1097/EDE.0000000000001262

Figure 2.

Figure 2.

Total counts of within-state and interstate firearm laws for 2000. This procedure was repeated for each year. Illinois and California have many laws and are marked in blue in the within-state map, but they are surrounded by states with few laws, so they are red in the interstate map.