1. Klinik für Herz- und Gefässchirurgie, Universitätsspital Zürich, Zurich, Switzerland
2. Department of Anesthesia and Perioperative Medicine, Evidence-Based Perioperative Clinical Outcomes Research Group (EPiCOR), London Health Sciences Centre, The University of Western Ontario, London, ON Canada
3. High Impact Technology Evaluation Centre, London Health Sciences Centre, London, ON Canada
4. Klinik für Kardiochirurgie, Herz- und Gefäß-Klinik GmbH, Bad Neustadt, Germany
5. Département de Pathologie Cardiaque, L'Institut Mutualiste Montsouris, Paris, France
6. Department of Cardiothoracic Surgery, East Carolina University School of Medicine, Greenville, NC USA
7. Sheba Medical Center, Tel Hashomer, Tel Aviv, Israel
8. Cardiac, Vascular & Thoracic Surgeons, Inc., Cincinnati, OH USA
9. Klinik für Herzchirurgie, Herzzentrum der Universität Leipzig, Leipzig, Germany.