| http://www.w3.org/ns/prov#value | - They examined the relationship between the legalization of medical marijuana and marijuana consumption using nationally representative data on high school students from the Youth Risky Behavior Survey (YRBS) for the years 1993 through 2009, a period when 13 states, including Alaska, California, Colorado, Hawaii, Maine, Nevada, Oregon and Washington, legalized medical marijuana.
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