| Academic Medical Center, Amsterdam, The Netherlands |
| Agaplesion Markus Krankenhaus, Frankfurt am Main, Germany |
| Atrium Medical Center, Heerlen, The Netherlands |
| Canisius-Wilhelmina Hospital, Nijmegen, The Netherlands |
| Cardiff and Vale University Hospital of Wales, Cardiff, United Kingdom |
| Catharina Ziekenhuis, Eindhoven, The Netherlands |
| Center of Excellence in Esophageal Surgery, Sf. Maria Clinical Hospital, Bucharest, Romania |
| Central University Hospital of Asturias, Oviedo, Spain |
| Chiba University, Graduate School of Medicine, Chiba, Japan |
| Clarunis University Digestive Health Care Center, Basal, Switzerland |
| Cleveland Clinics, Cleveland, USA |
| Clinic for Digestive surgery - First Surgical Clinic, Clinical Center of Serbia, Belgrade, Serbia |
| Connolly Hospital Blanchardstown, Dublin, Ireland |
| Department of Upper GI Surgery, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom |
| Erasmus MC, Rotterdam, The Netherlands |
| Fudan University Shanghai Cancer Center, Shanghai, China |
| Galaxy Care Laparoscopy Institute, Pune, India |
| GEM Hospital, Coimbatore, India |
| Hospital District of Helsinki and Uusimaa, Helsinki, Finland |
| Hospital Universitario del Mar, Barcelona, Spain |
| Imperial College London, London, United Kingdom |
| Instituto Nacional do Câncer, Rio de Janeiro, Brazil |
| IRCCS - University of Milano, Milano, Italy |
| IRCCS Istituto Clinico Humanitas, Milano, Italy |
| Karolinska Institutet, Stockholm, Sweden |
| Keio University, Tokyo, Japan |
| Klinik für Viszeral und Transplantationschirurgie, Zürich, Switzerland |
| l’Hospital Josep Trueta, Girona, Spain |
| Mayo Clinic, Rochester, USA |
| McGill University Health Centre, Montreal, Canada |
| MD Anderson, Houston, USA |
| Montreal General Hospital, Montreal, Canada |
| Motol University Hospital, Prague, Czech Republic |
| National Cancer Center Hospital, Tokyo, Japan |
| National University Cancer Institute, Singapore, Singapore |
| Netherlands Cancer Institute, Amsterdam, The Netherlands |
| Norfolk and Norwich University Hospital, Norwich, United Kingdom |
| Oregon Clinic, Portland, USA |
| Osaka City University School of Medicine, Osaka, Japan |
| Ospedale San Raffaelo, Milano, Italy |
| Oxford University Hospitals, Oxford, United Kingdom |
| Queen Alexandra Hospital, Portsmouth, United Kingdom |
| Queen Mary Hospital, University of Hong Kong, Hong Kong, Hong Kong |
| Radboud University Medical Center, Nijmegen, The Netherlands |
| Reinier de Graaf Gasthuis, Delft, The Netherlands |
| Royal Victoria Infirmary, New Castle, United Kingdom |
| Showa University - Northern Yokohama Hospital, Yokohama, Japan |
| St Antonius Hospital, Nieuwegein, The Netherlands |
| Tata Memorial Centre, Mumbai, India |
| The Cancer Institute Hospital Of JFCR, Tokyo, Japan |
| The Royal Marsden Hospital, London, United Kingdom |
| The Shanghai Chest Hospital, Shanghai, China |
| Toranomon Hospital, Tokyo, Japan |
| Triemli and Hirslanden Medical Center, Zürich, Switzerland |
| Trinity College, Dublin, Ireland |
| UMC of the Johannes Gutenberg University, Mainz, Germany |
| Uniklinik Köln, Cologne, Germany |
| Universita di Bologna, Bologna, Italy |
| University Hospital C. Huriez Place de Verdun, Lille, France |
| University Hospital Heidelberg, Heidelberg, Germany |
| University Hospitals Bristol, Bristol, United Kingdom |
| University Hospitals, Cleveland, USA |
| University Medical Center Utrecht, Utrecht, The Netherlands |
| University of Athens School of Medicine, Athens, Greece |
| University of Toronto, Toronto, Canada |
| University of Verona, Verona, Italy |
| Uonuma Institute and Niigata University, Niigata, Japan |
| UZ, Leuven, Belgium |
| Veneto Institute of Oncology, Padova, Italy |
| Virginia Mason Medical Center, Seattle, USA |
| VU University Medical Center, Amsterdam, The Netherlands |
| Ziekenhuisgroep Twente, Almelo & Hengelo, The Netherlands |