PT - JOURNAL ARTICLE ED - , TI - Briefly AID - 10.1503/cmaj.109-3128 DP - 2010 Feb 09 TA - Canadian Medical Association Journal PG - E135--E137 VI - 182 IP - 2 4099 - http://www.cmaj.ca/content/182/2/E135.short 4100 - http://www.cmaj.ca/content/182/2/E135.full SO - CMAJ2010 Feb 09; 182