Non-invasive assessment of Coronary Artery Disease: a comparison of Cardiovascular Magnetic Resonance Perfusion Imaging at 3 Tesla with Contrast Echocardiography - Arnold, JR; Karamitsos, T; Francis, J; Pegg, T; Searle, N; Neubauer, S; Becher, H; Selvanayagam, J (CIRCULATION, 2008)