1. Department of Thoracic and Cardiovascular Surgery, German Cardiac Competence Center, Eberhard-Karls-University of Tuebingen, 72076 Tübingen, Germany
2. Independent Researcher, Roter-Stich 127, 70376 Stuttgart, Germany
3. Department of Cardiology, German Cardiac Competence Center, Eberhard-Karls-University of Tuebingen, 72076 Tübingen, Germany
4. Department of Anesthesiology and Intensive Care Medicine, Eberhard-Karls-University of Tuebingen, 72076 Tübingen, Germany
5. Department of Cardiothoracic Surgery, Jena University Hospital, 07743 Jena, Germany
6. Department of Cardiac Surgery, LMU University Hospital, 80539 Munich, Germany
7. German Centre for Cardiovascular Research (DZHK), Partner site Munich Heart Alliance, 80802 Munich, Germany
8. Department of Cardiothoracic Surgery, Heart Center, University of Cologne, 50923 Cologne, Germany
9. Institute for Clinical Epidemiology and Applied Biostatistics, Eberhard-Karls-University of Tuebingen, 72074 Tübingen, Germany