1. Department of Cardiovascular Surgery, GVM Care & Research Anthea Hospital Bari Italy
2. Department of Cardiovascular Surgery, GVM Care & Research Santa Maria Hospital Bari Italy
3. Bristol Heart Institute University of Bristol Bristol UK
4. Department of Cardiovascular Surgery, GVM Care & Research Maria Cecilia Hospital, Cotignola Ravenna Italy
5. Department of Cardiovascular Surgery, GVM Care & Research Maria Eleonora Hospital Palermo Italy