PT - JOURNAL ARTICLE ED - , TI - Briefly AID - 10.1503/cmaj.109-4202 DP - 2012 Jun 12 TA - Canadian Medical Association Journal PG - E481--E484 VI - 184 IP - 9 4099 - http://www.cmaj.ca/content/184/9/E481.short 4100 - http://www.cmaj.ca/content/184/9/E481.full SO - CMAJ2012 Jun 12; 184