PT - JOURNAL ARTICLE ED - , TI - Correction DP - 1999 Nov 02 TA - Canadian Medical Association Journal PG - 1105--1105-b VI - 161 IP - 9 4099 - http://www.cmaj.ca/content/161/9/1105.3.short 4100 - http://www.cmaj.ca/content/161/9/1105.3.full SO - CMAJ1999 Nov 02; 161