1. Department of Cardiology; University Medical Center Utrecht; Utrecht The Netherlands
2. Department of Medicine; Division of Cardiology; Johns Hopkins University School of Medicine; Baltimore MD USA
3. Department of Radiology; Johns Hopkins University School of Medicine; Baltimore MD USA
4. Interuniversity Cardiology Institute of the Netherlands (ICIN); Utrecht The Netherlands
5. Department of Radiology; University Medical Center Utrecht; Utrecht The Netherlands
6. Radiology and Imaging Sciences; National Institutes of Health Clinical Center; Bethesda MD USA