1. Department of Cardiothoracic Surgery, Weill-Cornell Medical College, New York – Presbyterian Hospital, New York, NY, USA
2. Division of Cardiac Surgery, Department of Surgery, Medical University of Vienna, Vienna, Austria
3. Department of Cardiovascular Surgery, Centro Cardiologico Monzino-IRCCS, Milan, Italy
4. Division of Cardiac Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
5. Division of Cardiac Surgery, Department of Surgery, Schulich Heart Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada