RT Journal Article SR Electronic T1 Direct-to-consumer prescription drug advertising in Canada: Permission by default? JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 425 OP 427 VO 169 IS 5 A1 Gardner, David M. A1 Mintzes, Barbara A1 Ostry, Aleck YR 2003 UL http://www.cmaj.ca/content/169/5/425.abstract