PT - JOURNAL ARTICLE ED - , TI - Corrections AID - 10.1503/cmaj.060701 DP - 2006 Jul 04 TA - Canadian Medical Association Journal PG - 64--64-b VI - 175 IP - 1 4099 - http://www.cmaj.ca/content/175/1/64.3.short 4100 - http://www.cmaj.ca/content/175/1/64.3.full SO - CMAJ2006 Jul 04; 175