PT - JOURNAL ARTICLE ED - , TI - Query AID - 10.1503/cmaj.060667 DP - 2007 Jun 19 TA - Canadian Medical Association Journal PG - 1920--1920 VI - 176 IP - 13 4099 - http://www.cmaj.ca/content/176/13/1920.short 4100 - http://www.cmaj.ca/content/176/13/1920.full SO - CMAJ2007 Jun 19; 176