1. First Department of Medicine, Faculty of Medicine Mannheim, University Medical Centre Mannheim (UMM), University of Heidelberg, Mannheim, Germany
2. Clinic for Interventional Electrophysiology, Heart Centre Bad Neustadt, Bad Neustadt an der Saale, Germany
3. Department of Cardiology and Angiology, Philipps-University Marburg, Marburg, Germany
4. Department of Cardiology and Angiology II, University Heart Center Freiburg, Bad Krozingen, Germany
5. Institute of Clinical Chemistry, Laboratory Medicine and Transfusion Medicine, Nuremberg General Hospital, Paracelsus Medical University, Nuremberg, Germany