PT - JOURNAL ARTICLE ED - , TI - Corrections AID - 10.1503/cmaj.070502 DP - 2007 May 08 TA - Canadian Medical Association Journal PG - 1462--1462-a VI - 176 IP - 10 4099 - http://www.cmaj.ca/content/176/10/1462.2.short 4100 - http://www.cmaj.ca/content/176/10/1462.2.full SO - CMAJ2007 May 08; 176