PT - JOURNAL ARTICLE ED - , TI - Correction AID - 10.1503/cmaj.1041188 DP - 2004 Aug 31 TA - Canadian Medical Association Journal PG - 432--432-a VI - 171 IP - 5 4099 - http://www.cmaj.ca/content/171/5/432.2.short 4100 - http://www.cmaj.ca/content/171/5/432.2.full SO - CMAJ2004 Aug 31; 171