Detection of Vein Graft Disease Using 4-Row Computed Tomography. Evaluation of Coronary Bypass Graft Patency and Correlation with the Ca-Score - Wittlinger, T; Martinovic, I; Bakhtiary, F; Oezaslan, F; Moritz, A; Ehrhard, K (The Thoracic and Cardiovascular Surgeon, 2006)