1. Department of Anatomical, Histological, Forensic Medicine and Orthopedic Sciences, Sapienza University of Rome, Rome, Italy
2. Department of Surgery and Cancer, Imperial College London, London, United Kingdom
3. Department of Cardiothoracic Surgery, Hammersmith Hospital, Imperial College Healthcare NHS Trust, London, United Kingdom
4. Myocardial Function Section, National Heart and Lung Institute, Imperial College London, London, United Kingdom