RT Journal Article SR Electronic T1 The Authors' response JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP hrt.2010.195867 DO 10.1136/hrt.2010.195867 A1 H J Simpson A1 S J Gandy A1 J G Houston A1 A D Struthers YR 2010 UL http://heart.bmj.com/content/early/2010/05/17/hrt.2010.195867.abstract AB