RT Journal Article SR Electronic T1 The Check-Off: A precursor of medicare in Canada? JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1504 OP 1506 VO 173 IS 12 A1 Chryssa McAlister A1 Peter Twohig YR 2005 UL http://www.cmaj.ca/content/173/12/1504.abstract