1. Unit of Thoracic Surgery, San Camillo Forlanini Hospital , Rome, Italy
2. Unicamillus–Saint Camillus University of Health Sciences , Rome, Italy
3. Alma Mater Studiorum, Univeristy of Bologna , Bologna, Italy
4. Department of Cardiothoracic Surgery, Copenhagen University Hospital, Rigshospitalet , Copenhagen, Denmark
5. Department of Thoracic Surgery, St James's University Hospital , Leeds, UK