1. Department of Thoracic Surgery, Maggiore Teaching Hospital, Bologna, Italy
2. Department of Thoracic Surgery, Agostino Gemelli Hospital, Catholic University of Sacred Heart, Rome, Italy
3. Division of Thoracic Surgery and Lung Transplantation, Department for Treatment and Study of Cardiothoracic Diseases and Cardiothoracic Transplantation, IRCCS ISMETT, Palermo, Italy
4. Department of Physiopathology and Transplantation, Thoracic Surgery and Lung Transplant Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, University of Milan, Milan, Italy