RT Journal Article SR Electronic T1 Choice of heart valve prosthesis JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 583 OP 589 DO 10.1136/heart.87.6.583 VO 87 IS 6 A1 Bloomfield, Peter YR 2002 UL http://heart.bmj.com/content/87/6/583.abstract AB