PT - JOURNAL ARTICLE ED - , TI - Drug interactions DP - 1999 Jul 27 TA - Canadian Medical Association Journal PG - 117--117 VI - 161 IP - 2 4099 - http://www.cmaj.ca/content/161/2/117.short 4100 - http://www.cmaj.ca/content/161/2/117.full SO - CMAJ1999 Jul 27; 161