1. Department of Thoracic Surgery, Lausanne University Hospital , Lausanne, Switzerland
2. Department of Thoracic Surgery, University Hospitals Leuven , Leuven, Belgium
3. Department of Thoracic Surgery, University Medicine Essen-Ruhrlandklinik , Essen, Germany
4. Department of Thoracic Surgery, National Institute of Oncology , Budapest, Hungary
5. Department of Thoracic Surgery, University Hospital Zurich , Zurich, Switzerland
6. Department of Surgery, University of Szeged , Szeged, Hungary
7. Department of Surgery Medical School, University of Pécs , Hungary
8. Department of Thoracic Surgery, St James’s University Hospital , Leeds, UK
9. Department of Thoracic Surgery, Strasbourg University Hospital , Strasbourg, France