RT Journal Article SR Electronic T1 US Congress to consider limits on DTCA JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1404 OP 1404 DO 10.1503/cmaj.070484 VO 176 IS 10 A1 Patricia Guthrie YR 2007 UL http://www.cmaj.ca/content/176/10/1404.abstract