1. Department of Cardiology, Leiden Heart-Lung Center, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, the Netherlands
2. Department of Pediatric Cardiology and Congenital Heart Disease, German Heart Center Munich, Techniche Universität München, Munich, Germany
3. Department of Radiology, German Heart Center Munich, Techniche Universität München, Munich, Germany