PT - JOURNAL ARTICLE ED - , TI - Corrections DP - 2003 Feb 04 TA - Canadian Medical Association Journal PG - 257--257-a VI - 168 IP - 3 4099 - http://www.cmaj.ca/content/168/3/257.2.short 4100 - http://www.cmaj.ca/content/168/3/257.2.full SO - CMAJ2003 Feb 04; 168