RT Journal Article SR Electronic T1 Sequential triple-valve replacement in a Jehovah's Witness JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 433 OP 435 VO 122 IS 4 A1 M. Lang A1 G. G. Youngson A1 F. N. McKenzie A1 R. O. Heimbecker YR 1980 UL http://www.cmaj.ca/content/122/4/433.abstract