RT Journal Article SR Electronic T1 Paying the doctor: the three-layered cake revisited JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 642 OP 643 VO 112 IS 5 A1 Lee, S. S. A1 Butler, L. M. YR 1975 UL http://www.cmaj.ca/content/112/5/642.abstract