Institution: | 2. Department of Cardiothoracic Surgery, Manchester Royal Infirmary, Manchester, United Kingdom;3. Papworth Hospital, Papworth, United Kingdom;4. Department of Cardiothoracic Surgery, Liverpool Heart and Chest Hospital, Liverpool, United Kingdom;5. Department of Cardiac Surgery, Barts Heart Center, St Bartholomew''s Hospital, London, United Kingdom;11. University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom |