1. Department of Visceral and Transplant Surgery, University Hospital Zurich, Zurich, Switzerland
2. IRCCS Policlinico San Donato, Division of General and Foregut Surgery, Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
3. Oesophago-Gastric and Bariatric Unit, Department of General Surgery, The Alfred Hospital, Melbourne, Australia
4. Department of Surgery, Vall d'Hebron Hospital, Barcelona, Spain
5. Department of General Surgery, Norfolk and Norwich University Hospital, Norwich, UK
6. Division of Thoracic Surgery, Department of Surgery, Toronto General Hospital, University of Toronto, Toronto, Canada
7. Department of General, Visceral-, Thoracic-, Transplantation-, and Pediatric Surgery, Kurt-Semm Center for Laparoscopic and Robotic Assisted Surgery, University Hospital Schleswig Holstein, Campus Kiel, Kiel, Germany
8. Departments of Surgery and Oncology, Montreal General Hospital, McGill University, Montreal, Canada
9. Amsterdam UMC, University of Amsterdam, Department of Surgery, Cancer Center Amsterdam, Amsterdam, The Netherlands
10. Department of Visceral, Thoracic, Transplant and Vascular surgery, University Hospital of Leipzig, Leipzig, Germany
11. Department of General, Visceral and Transplant Surgery, University Medical Center of the Johannes Gutenberg University, Mainz, Germany
12. Department of Thoracic and Cardiovascular Surgery, University of Texas MD Anderson Cancer Center, Houston, USA
13. Center for Oesophageal and Gastric Surgery, AGAPLESION Markus Krankenhaus, Frankfurt am Main, Germany
14. Department of General, Thoracic and Vascular Surgery, Virginia Mason Medical Center, Seattle, USA
15. Department of Surgery, Catharina Hospital, Eindhoven, The Netherlands
16. Imperial College Healthcare NHS Trust and Imperial College, London, UK
17. Division of Visceral Surgery, Department of Surgery, University of Geneva, Hospitals and School of Medicine, Geneva, Switzerland
18. Division of Thoracic Surgery, Department of Surgery, Massachusetts General Hospital, Boston, USA
19. Department of General, Visceral and Transplantation Surgery, University of Heidelberg, Heidelberg, Germany
20. Department of Thoracic Surgery, University Hospital Leuven, Leuven, Belgium
21. Esophageal Institute, Hospital Universitario Fundacion Favaloro, Buenos Aires, Argentina
22. Division of Surgery, Department of Clinical Science Intervention and Technology, Karolinska Institute, Stockholm, Sweden
23. Department of Surgical Gastroenterology, GEM Hospital & Research Centre, Coimbatore, India
24. Department of Surgery, University Center Ghent, Ghent, Belgium
25. Department of Surgery, Section of Gastrointestinal Surgery, Hospital Universitario del Mar, Universitat Autònoma de Barcelona, Barcelona, Spain
26. Department of General Thoracic and Esophageal Surgery, Heart and Lung Centre, Helsinki University Hospital, Helsinki, Finland
27. Department of Gastroenterology, Cancer Institute, University of São Paulo Medical School, São Paulo, Brazil
28. Department of Surgical Oncology, Radboud University Medical Center, Nijmegen, The Netherlands
29. Department of General, Visceral and Cancer Surgery, University of Cologne, Germany
30. Department of Upper GI Surgery, Oxford University Hospitals, UK
31. General Surgery Department, AMC-Academic Medical Center, Amsterdam, The Netherlands
32. Department of Surgical Oncology, University Medical Center Utrecht, The Netherlands
33. Flinders University Department of Surgery, Flinders Medical Centre, Bedford Park, Australia
34. Department of Surgery, Erasmus MC, University Medical Center Rotterdam, The Netherlands