PT - JOURNAL ARTICLE ED - , TI - Smoking and health DP - 1991 Mar 15 TA - Canadian Medical Association Journal PG - 630a--631 VI - 144 IP - 6 4099 - http://www.cmaj.ca/content/144/6/630a.short 4100 - http://www.cmaj.ca/content/144/6/630a.full SO - CMAJ1991 Mar 15; 144