PT - JOURNAL ARTICLE ED - , TI - Correction AID - 10.1503/cmaj.050975 DP - 2005 Aug 30 TA - Canadian Medical Association Journal PG - 468--468-a VI - 173 IP - 5 4099 - http://www.cmaj.ca/content/173/5/468.2.short 4100 - http://www.cmaj.ca/content/173/5/468.2.full SO - CMAJ2005 Aug 30; 173