PT - JOURNAL ARTICLE ED - , TI - Briefly AID - 10.1503/cmaj.109-4148 DP - 2012 Apr 03 TA - Canadian Medical Association Journal PG - E301--E303 VI - 184 IP - 6 4099 - http://www.cmaj.ca/content/184/6/E301.short 4100 - http://www.cmaj.ca/content/184/6/E301.full SO - CMAJ2012 Apr 03; 184