TY - JOUR T1 - Doctors asked to take pledge to shun drug company freebies JF - Canadian Medical Association Journal JO - CMAJ SP - 531 LP - 531-a VL - 164 IS - 4 AU - Barbara Sibbald Y1 - 2001/02/20 UR - http://www.cmaj.ca/content/164/4/531.2.abstract ER -