PT - JOURNAL ARTICLE ED - , TI - Correction DP - 2002 Jul 23 TA - Canadian Medical Association Journal PG - 128--128-c VI - 167 IP - 2 4099 - http://www.cmaj.ca/content/167/2/128.4.short 4100 - http://www.cmaj.ca/content/167/2/128.4.full SO - CMAJ2002 Jul 23; 167