PT - JOURNAL ARTICLE ED - , TI - Query AID - 10.1503/cmaj.050220 DP - 2005 Apr 26 TA - Canadian Medical Association Journal PG - 1256--1256 VI - 172 IP - 9 4099 - http://www.cmaj.ca/content/172/9/1256.short 4100 - http://www.cmaj.ca/content/172/9/1256.full SO - CMAJ2005 Apr 26; 172