PT - JOURNAL ARTICLE ED - , TI - Correction DP - 2001 Sep 18 TA - Canadian Medical Association Journal PG - 744--744-b VI - 165 IP - 6 4099 - http://www.cmaj.ca/content/165/6/744.3.short 4100 - http://www.cmaj.ca/content/165/6/744.3.full SO - CMAJ2001 Sep 18; 165