1. Department of Cardiology, University Medical Center Mainz, Johannes Gutenberg-University, Langenbeckstraße 1, 55131 Mainz, Germany
2. Department of Diagnostic and Interventional Radiology, University Medical Center Mainz, Johannes Gutenberg-University, Mainz, Germany
3. Division of Cardiovascular Imaging, Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, USA