PT - JOURNAL ARTICLE ED - , TI - Briefly AID - 10.1503/cmaj.109-4071 DP - 2012 Jan 10 TA - Canadian Medical Association Journal PG - E11--E14 VI - 184 IP - 1 4099 - http://www.cmaj.ca/content/184/1/E11.short 4100 - http://www.cmaj.ca/content/184/1/E11.full SO - CMAJ2012 Jan 10; 184