PT - JOURNAL ARTICLE ED - , TI - Corrections AID - 10.1503/cmaj.050646 DP - 2005 Jun 21 TA - Canadian Medical Association Journal PG - 1668--1668-d VI - 172 IP - 13 4099 - http://www.cmaj.ca/content/172/13/1668.5.short 4100 - http://www.cmaj.ca/content/172/13/1668.5.full SO - CMAJ2005 Jun 21; 172