1 From the *Department of Anesthesia and Perioperative Medicine, London Health Sciences Centre, The University of Western Ontario, London, Ontario, Canada; †Herz-Und Gefasse Klinik Bad Neustadt, University of Leipzig, Bad Neustadt, Germany; ‡The Heart Center of Indiana, Division of Cardiothoracic Surgery, Indianapolis, Indiana; §Toronto General Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada; ∥University of Kiel School of Medicine, Kiel, Germany; ¶Texas Heart Institute at St Luke's Episcopal Hospital, Houston, Texas; **Division of Cardiovascular Surgery, Department of Surgery, Shiga University of Medical Science, Otsu, Japan; ††Rikshopitalet-Radiumhospitalet, Oslo, Norway; ‡‡National Heart, Lung, and Blood Institute, NIH, Bethesda, Maryland; and §§High Impact Technology Evaluation Centre, London Health Sciences Centre, University Hospital, London, Ontario, Canada.