PT - JOURNAL ARTICLE ED - , TI - Briefly AID - 10.1503/cmaj.109-4372 DP - 2013 Jan 08 TA - Canadian Medical Association Journal PG - E39--E42 VI - 185 IP - 1 4099 - http://www.cmaj.ca/content/185/1/E39.short 4100 - http://www.cmaj.ca/content/185/1/E39.full SO - CMAJ2013 Jan 08; 185