PT - JOURNAL ARTICLE ED - , TI - Corrections AID - 10.1503/cmaj.081825 DP - 2008 Dec 02 TA - Canadian Medical Association Journal PG - 1301--1301-c VI - 179 IP - 12 4099 - http://www.cmaj.ca/content/179/12/1301.4.short 4100 - http://www.cmaj.ca/content/179/12/1301.4.full SO - CMAJ2008 Dec 02; 179