PT - JOURNAL ARTICLE ED - , TI - Corrections AID - 10.1503/cmaj.071584 DP - 2007 Nov 20 TA - Canadian Medical Association Journal PG - 1392--1392-b VI - 177 IP - 11 4099 - http://www.cmaj.ca/content/177/11/1392.3.short 4100 - http://www.cmaj.ca/content/177/11/1392.3.full SO - CMAJ2007 Nov 20; 177