PT - JOURNAL ARTICLE ED - , TI - Briefly AID - 10.1503/cmaj.109-4038 DP - 2011 Nov 22 TA - Canadian Medical Association Journal PG - E1241--E1243 VI - 183 IP - 17 4099 - http://www.cmaj.ca/content/183/17/E1241.short 4100 - http://www.cmaj.ca/content/183/17/E1241.full SO - CMAJ2011 Nov 22; 183