RT Journal Article SR Electronic T1 E ring chromosome with persistent left superior vena cava and hypertrophic subaortic stenosis. JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 328 OP 333 DO 10.1136/jmg.6.3.328 VO 6 IS 3 A1 S Wald A1 E Engel A1 W E Nance A1 J Davies A1 F A Puyau A1 B C Sinclair-Smith YR 1969 UL http://jmg.bmj.com/content/6/3/328.abstract AB