PT - JOURNAL ARTICLE ED - , TI - Correction AID - 10.1503/cmaj.1040568 DP - 2004 Apr 27 TA - Canadian Medical Association Journal PG - 1375--1375-b VI - 170 IP - 9 4099 - http://www.cmaj.ca/content/170/9/1375.3.short 4100 - http://www.cmaj.ca/content/170/9/1375.3.full SO - CMAJ2004 Apr 27; 170