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PMC 2531137

Heavy cannabis use and light tobacco use is associated with the highest risk of conversion to psychosis To investigate the doseresponse relationships of tobacco and cannabis use on conversion to psychosis, we categorized the intensity of cannabis and tobacco use (no use, light use, heavy use for each substance

doi: 10.1183/09031936.00011211

Over the last two years of data (May 2012 to April 2014), monthly use of cigarettes in Wyoming was 4.9 stamps per capita compared to 7.6 stamps per capita for the two years prior to the 2003 tax increase

[8] Religious use of tobacco is still common to this day amongst many indigenous peoples, particularly in the Americas