1. Department of Cardiac Surgery, Centre Cardiologique du Nord de Saint-Denis, Paris, France
2. Department of Cardiothoracic Surgery, Golden Jubilee National Hospital, Glasgow, UK
3. Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
4. Department of Cardiovascular Sciences, Fondazione Policlinico Universitario A. Gemelli IRCSS, Rome, Italy
5. Department of Cardiac Surgery, La Pitié Salpetriere Hospital, Paris, France