PT - JOURNAL ARTICLE ED - , TI - Corrections DP - 2003 Jan 21 TA - Canadian Medical Association Journal PG - 152--152-c VI - 168 IP - 2 4099 - http://www.cmaj.ca/content/168/2/152.4.short 4100 - http://www.cmaj.ca/content/168/2/152.4.full SO - CMAJ2003 Jan 21; 168