1. Division of Thoracic Surgery, University of Campania Luigi Vanvitelli, 80131 Naples, Italy
2. Lung Transplantation Unit, University of Siena, 53100 Siena, Italy
3. Division of Thoracic Surgery, Cantonal Hospital Lucerne, 6000 Lucerne, Switzerland
4. Division of Thoracic Surgery, Sapienza University, Sant’Andrea Hospital, 00189 Rome, Italy