PT - JOURNAL ARTICLE ED - , TI - Correction AID - 10.1503/cmaj.110-2081 DP - 2010 Jun 15 TA - Canadian Medical Association Journal PG - 942--942-b VI - 182 IP - 9 4099 - http://www.cmaj.ca/content/182/9/942.3.short 4100 - http://www.cmaj.ca/content/182/9/942.3.full SO - CMAJ2010 Jun 15; 182