RT Journal Article SR Electronic T1 Framework urges physicians to proceed with caution on palliative sedation JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 174 OP 175 DO 10.1503/cmaj.109-3766 VO 183 IS 2 A1 Lauren Vogel YR 2011 UL http://www.cmaj.ca/content/183/2/174.abstract