RT Journal Article SR Electronic T1 Ontario's proposed consent laws: 1. Consent and capacity, substitute decisions, advance directives and emergency treatment JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 829 OP 832 VO 146 IS 6 A1 P. A. Singer A1 S. Choudhry YR 1992 UL http://www.cmaj.ca/content/146/6/829.abstract