PT - JOURNAL ARTICLE ED - , TI - Briefly AID - 10.1503/cmaj.109-4323 DP - 2012 Nov 20 TA - Canadian Medical Association Journal PG - E901--E903 VI - 184 IP - 17 4099 - http://www.cmaj.ca/content/184/17/E901.short 4100 - http://www.cmaj.ca/content/184/17/E901.full SO - CMAJ2012 Nov 20; 184