1. Department of Surgery, Guy's & St Thomas’ Esophago-Gastric Centre
2. Division of Cancer Studies, King's College London
3. Upper GI Surgery, Department of Molecular Medicine and Surgery, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
4. Department of Upper Gastrointestinal Surgery, Oxford Esophago-Gastric Centre, Oxford University Hospitals
5. NIHR Oxford Biomedical Research Centre, Churchill Hospital, Oxford
6. Department of Surgery, Royal Marsden Hospital, London
7. Department of Thoracic Surgery, Virginia Mason Medical Centre, Seattle, Washington, USA
8. Department of Surgery, Glasgow Royal Infirmary, Glasgow, UK
9. Cancer Epidemiology Group, Division of Cancer Studies, King's College London