1. Thoracic Surgery and Lung Transplant Unit, Fondazione Irccs Ca’ Granda Ospedale Maggiore Policlinico, Milan, Italy
2. Thoracic Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY, USA
3. Thoracic Surgery Unit, University of L’Aquila, “G. Mazzini” Hospital, Teramo, Italy