RT Journal Article SR Electronic T1 Kickbacks and self-referral JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 12 OP 13 DO 10.1503/cmaj.1040626 VO 171 IS 1 A1 Irfan Dhalla YR 2004 UL http://www.cmaj.ca/content/171/1/12.2.abstract