1. Divisions of Cardiology, Angiology, Pneumology, and Intensive Medical Care, Department of Internal Medicine 1, Friedrich-Schiller-University of Jena, Erlanger Allee 101, D-07740 Jena, Germany
2. Department of Cardiothoracic Surgery, Jena University Hospital-Friedrich Schiller University of Jena, Erlanger Allee 101, 07747 Jena, Germany
3. University Hospital Düsseldorf, Department of Medicine, Division of Cardiology, Pulmonary Diseases and Vascular Medicine, Moorenstr. 5, D-40225 Düsseldorf, Germany
4. Charité-Universitaetsmedizin Berlin, Department of Cardiology Berlin, Campus Benjamin Franklin, Germany