PT - JOURNAL ARTICLE ED - , TI - Corrections AID - 10.1503/cmaj.050835 DP - 2005 Aug 02 TA - Canadian Medical Association Journal PG - 239--239-a VI - 173 IP - 3 4099 - http://www.cmaj.ca/content/173/3/239.2.short 4100 - http://www.cmaj.ca/content/173/3/239.2.full SO - CMAJ2005 Aug 02; 173