PT - JOURNAL ARTICLE AU - Murray J. Elston TI - Following the rules in marketing DP - 1999 Sep 21 TA - Canadian Medical Association Journal PG - 685--685-b VI - 161 IP - 6 4099 - http://www.cmaj.ca/content/161/6/685.3.short 4100 - http://www.cmaj.ca/content/161/6/685.3.full SO - CMAJ1999 Sep 21; 161