PT - JOURNAL ARTICLE ED - , TI - Briefly AID - 10.1503/cmaj.109-3791 DP - 2011 Feb 22 TA - Canadian Medical Association Journal PG - E160--E161 VI - 183 IP - 3 4099 - http://www.cmaj.ca/content/183/3/E160.short 4100 - http://www.cmaj.ca/content/183/3/E160.full SO - CMAJ2011 Feb 22; 183