PT - JOURNAL ARTICLE ED - , TI - Briefly AID - 10.1503/cmaj.109-4582 DP - 2013 Sep 17 TA - Canadian Medical Association Journal PG - E625--E628 VI - 185 IP - 13 4099 - http://www.cmaj.ca/content/185/13/E625.short 4100 - http://www.cmaj.ca/content/185/13/E625.full SO - CMAJ2013 Sep 17; 185