Borg Alexander N, Deepak Sasalu M, Beynon Rhys P, Williams Simon G, Ray Simon G
Department of Cardiology, Wythenshawe Hospital, Manchester, United Kingdom.
J Am Soc Echocardiogr. 2007 Oct;20(10):1149-59. doi: 10.1016/j.echo.2007.02.002. Epub 2007 Jul 2.