1. Department of Cardiothoracic Surgery, Erasmus University Medical Center, Rotterdam, the Netherlands
2. Department of Cardiac Surgery, Sant’Andrea Hospital, Sapienza University of Rome, Rome, Italy
3. Department of Cardiothoracic Surgery and Transplantation, Royal Brompton & Harefield Hospitals, Guy’s and St Thomas’ NHS Foundation Trust, London, United Kingdom
4. Division of Cardiovascular Surgery, University of Pennsylvania, Philadelphia
5. Department of Cardiovascular Surgery, The Mount Sinai Hospital, Icahn School of Medicine at Mount Sinai, New York, New York
6. National Heart and Lung Institute, Imperial College London, London, United Kingdom
7. Cardiac Surgery Department, Aswan Heart Centre, Magdi Yacoub Foundation, Aswan, Egypt