1. Department of Thoracic Surgery, Zurich University Hospital, Zurich, Switzerland
2. Department of Thoracic Surgery, University Hospitals Leuven, Leuven, Belgium
3. Division of Thoracic Surgery, Lausanne University Hospital, Lausanne, Switzerland
4. Department of Cardio-Thoracic Surgery, Padua University Hospital, Padova, Italy
5. University of Milan, Foundation IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy
6. Division of Thoracic Surgery, Columbia University Medical Center, New York, NY, USA
7. Department of Thoracic Surgery, University Hospital Essen, Essen, Germany
8. Department of Surgery, Al Faisal University, Riyadh, Saudi Arabia
9. Division of Thoracic Surgery, University of Marseilles, Marseilles, France
10. Department of Thoracic Surgery Medical, University of Vienna, Vienna, Austria