TY - JOUR T1 - Advance directives: are they an advance? Advance Directives Seminar Group, Centre for Bioethics, University of Toronto JF - Canadian Medical Association Journal JO - CMAJ SP - 127 LP - 134 VL - 146 IS - 2 A2 - , Y1 - 1992/01/15 UR - http://www.cmaj.ca/content/146/2/127.abstract ER -