RT Journal Article SR Electronic T1 Degenerative aortic stenosis JF BMJ JO BMJ FD British Medical Journal Publishing Group SP 550 OP 555 DO 10.1136/bmj.39478.498819.AD VO 336 IS 7643 A1 Ramaraj, Radhakrishnan A1 Sorrell, Vincent L YR 2008 UL http://www.bmj.com/content/336/7643/550.abstract AB