Comparison of exercise testing and CMR measured myocardial perfusion reserve for predicting outcome in asymptomatic aortic stenosis: the PRognostic Importance of MIcrovascular Dysf... by Singh, A, Greenwood, J, Berry, C, Dawson, D, Hogrefe, K, Kelly, D, Dhakshinamurthy, V, Lang, C, Khoo, J, Sprigings, D, Steeds, R, Jerosch-Herold, M, Neubauer, S, Prendergast, B, Williams, B, Zhang, R, Hudson, I, Squire, I, Ford, I, Samani, N, McCann, G