RT Journal Article SR Electronic T1 Tough choices? JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 592 OP 592-a DO 10.1503/cmaj.110-2044 VO 182 IS 6 A1 Ralph F. Bloch YR 2010 UL http://www.cmaj.ca/content/182/6/592.2.abstract