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Cross-national differences in clinically significant cannabis problems: epidemiologic evidence from 'cannabis-only' smokers in the United States, Mexico, and Colombia

Fabian Fiestas, Mirjana Radovanovic, Silvia S Martins, Maria E Medina-Mora, Jose Posada-Villa and James C Anthony*

BMC Public Health 2010, 10:152  doi:10.1186/1471-2458-10-152

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