1. Department of Medicine II, University of Erlangen-Nürnberg, Erlangen, Germany
2. Washington Cardiology Center, Washington, DC, USA
3. Department of Medicine, Charitè—Campus Virchow Klinikum, Humboldt University, Berlin
4. Department of Radiology, Charitè—Campus Virchow Klinikum, Humboldt University, Berlin
5. Center for Cardiology and Vascular Intervention, Hamburg, Germany