1. Department of Thoracic and Cardiovascular Surgery, Thorax Institute, Nantes Hospital University , Nantes, France
2. Department of Thoracic and Cardiovascular Surgery, University Hospital Centre—INSERM LTSI 1099 , Rennes, France
3. Department of Thoracic and Cardiovascular Surgery, University Hospital , Angers, France
4. Department of Cardiovascular and Thoracic Surgery, Brest University Hospital , Brest, France
5. Department of Cardiothoracic Surgery, Trousseau University Hospital , Tours, France
6. Department of Cardiac Surgery, New Clinic St Gatien , Tours, France