PT - JOURNAL ARTICLE ED - , TI - Corrections AID - 10.1503/cmaj.060246 DP - 2006 Mar 14 TA - Canadian Medical Association Journal PG - 815--815-a VI - 174 IP - 6 4099 - http://www.cmaj.ca/content/174/6/815.2.short 4100 - http://www.cmaj.ca/content/174/6/815.2.full SO - CMAJ2006 Mar 14; 174