1 Cardiac and Thoracic Surgery Division, Lille University Teaching Hospital, CHULille, F59037 Lille, France. Electronic address: alain.wurtz@chru-lille.fr.
2 Cardiac and Thoracic Surgery Division, Lille University Teaching Hospital, CHULille, F59037 Lille, France.
3 Department of Thoracic Surgery, Valenciennes Hospital, Valenciennes, France.
4 Department of Thoracic Surgery, Laval Hospital, Québec, Québec, Canada.