RT Journal Article SR Electronic T1 Functional results with aortic ball valve prostheses (Starr-Edwards) followed for two to three years. JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 21 OP 24 DO 10.1136/thx.22.1.21 VO 22 IS 1 A1 Björk, V O A1 Cullhed, I YR 1967 UL http://thorax.bmj.com/content/22/1/21.abstract AB