PT - JOURNAL ARTICLE ED - , TI - Query AID - 10.1503/cmaj.061254 DP - 2007 May 22 TA - Canadian Medical Association Journal PG - 1672--1672 VI - 176 IP - 11 4099 - http://www.cmaj.ca/content/176/11/1672.short 4100 - http://www.cmaj.ca/content/176/11/1672.full SO - CMAJ2007 May 22; 176