RT Journal Article SR Electronic T1 Evidence or faith? Coronary artery bypass grafting in elderly patients JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 775 OP 776 VO 165 IS 6 A1 Ghali, William A. A1 Graham, Michelle M. YR 2001 UL http://www.cmaj.ca/content/165/6/775.abstract