1. Department of Anesthesia and Perioperative Medicine, London Health Sciences Centre, The University of Western Ontario, London, Ontario, Canada
2. Herz-Und Gefasse Klinik Bad Neustadt, University of Leipzig, Bad Neustadt, Germany
3. The Heart Center of Indiana, Division of Cardiothoracic Surgery, Indianapolis, Indiana
4. Toronto General Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada
5. University of Kiel School of Medicine, Kiel, Germany
6. Texas Heart Institute at St Luke's Episcopal Hospital, Houston, Texas
7. Division of Cardiovascular Surgery, Department of Surgery, Shiga University of Medical Science, Otsu, Japan
8. Rikshopitalet-Radium-hospitalet, Oslo, Norway
9. National Heart, Lung, and Blood Institute, NIH, Bethesda, Maryland
10. High Impact Technology Evaluation Centre, London Health Sciences Centre, University Hospital, London, Ontario, Canada.