1. Department of Thoracic Surgery, Medical University Vienna, Vienna, Austria
2. Department of Thoracic and Vascular Surgery and Heart-Lung Transplantation, Marie-Lannelongue Hospital, Paris Sud University, Paris, France
3. Division of Thoracic Surgery, University of Toronto, Toronto, ON, Canada
4. Department of Thoracic Surgery, Aix-Marseille University, Marseille, France
5. Department of Thoracic Surgery, University Hospitals Leuven, Leuven, Belgium
6. Department of Thoracic Surgery, Guy's and St Thomas' NHS Foundation Trust, London, UK
7. Division of Thoracic Surgery, University Hospital Zürich, Zürich, Switzerland
8. Department of Surgery, Section of Thoracic Surgery, University of Torino, Torino, Italy
9. Department of Thoracic Surgery, Hospital Universitario Puerta de Hierro Majadahonda, Madrid, Spain
10. Division of Thoracic Surgery, Department of Surgery, University of Montréal, Montreal, QC, Canada
11. Service of Thoracic Surgery, University Hospital, Salamanca, Spain
12. Department of Thoracic Surgery, University College London Hospital, London, UK