| http://www.w3.org/ns/prov#value | - Here, Read this Effects of cannabis - Wikipedia, the free encyclopedia A December 2006 study by the American Psychiatric Association, which was a 12 year study on 214 boys from ages 10???12 showed that adolescents who used marijuana prior to using other drugs, including alcohol and tobacco, were no more likely to develop a substance abuse disorder than other subjects in the study.
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