1. Thoracic Surgery and Lung Transplant Unit, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, University of Milan, Milan - Italy
2. Thoracic Surgery Unit, Azienda Socio Sanitaria Territoriale Carlo Poma, Mantova - Italy
3. Thoracic Surgery Unit, Azienda Ospedaliera Universitaria Senese, Siena - Italy
4. Thoracic Surgery Unit, ASL Romagna, Forlì - Italy
5. Thoracic Surgery Unit, Ospedale Mazzini, University of Aquila, Teramo - Italy