PT - JOURNAL ARTICLE ED - , TI - Correction DP - 1999 Nov 16 TA - Canadian Medical Association Journal PG - 1241--1241-b VI - 161 IP - 10 4099 - http://www.cmaj.ca/content/161/10/1241.3.short 4100 - http://www.cmaj.ca/content/161/10/1241.3.full SO - CMAJ1999 Nov 16; 161