PT - JOURNAL ARTICLE AU - Steven L. Shumak TI - Cannabis every day? AID - 10.1503/cmaj.1150034 DP - 2015 May 19 TA - Canadian Medical Association Journal PG - 602--602 VI - 187 IP - 8 4099 - http://www.cmaj.ca/content/187/8/602.2.short 4100 - http://www.cmaj.ca/content/187/8/602.2.full SO - CMAJ2015 May 19; 187