PT - JOURNAL ARTICLE ED - , TI - Corrections AID - 10.1503/cmaj.060016 DP - 2006 Jan 31 TA - Canadian Medical Association Journal PG - 353--353-b VI - 174 IP - 3 4099 - http://www.cmaj.ca/content/174/3/353.3.short 4100 - http://www.cmaj.ca/content/174/3/353.3.full SO - CMAJ2006 Jan 31; 174