RT Journal Article SR Electronic T1 CanWest set to challenge ban on DTCA JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 19 OP 20 DO 10.1503/cmaj.061505 VO 176 IS 1 A1 Priest, Alicia YR 2007 UL http://www.cmaj.ca/content/176/1/19.abstract