Open Heart Williams, M C, Golay, S K, Hunter, A, Weir-McCall, J R, Mlynska, L, Dweck, M R, Uren, N G, Reid, J H, Lewis, S C, Berry, C, van Beek, E J R, Roditi, G, Newby, D E & Mirsadraee, S 2015, ' Observer variability in the assessment of CT coronary angiography and coronary artery calcium score : substudy of the Scottish COmputed Tomography of the HEART (SCOT-HEART) trial ' vol. 2, no. 1, pp. e000234 . DOI: 10.1136/openhrt-2014-000234