DNA double-strand breaks as potential indicators for the biological effects of ionising radiation exposure from cardiac CT and conventional coronary angiography: a randomised, controlled study. - Geisel, Dominik; Zimmermann, Elke; Rief, Matthias; Greupner, Johannes; Laule, Michael; Knebel, Fabian; Hamm, Bernd; Dewey, Marc (European Radiology, 2012)