PT - JOURNAL ARTICLE ED - , TI - Briefly AID - 10.1503/cmaj.109-4136 DP - 2012 Mar 20 TA - Canadian Medical Association Journal PG - E254--E255 VI - 184 IP - 5 4099 - http://www.cmaj.ca/content/184/5/E254.short 4100 - http://www.cmaj.ca/content/184/5/E254.full SO - CMAJ2012 Mar 20; 184