1. Nuffield Department of Surgery University of Oxford Oxford UK
2. Department of Molecular Medicine and Surgery Karolinska Institute Stockholm Sweden
3. Department of Surgery York Teaching Hospital NHS Foundation Trust York UK
4. Department of Biomedical Sciences for Health Division of General and Foregut Surgery IRCCS Policlinico San Donato University of Milan Milan Italy
5. Department of Health Research Methods, Evidence and Impact McMaster University Hamilton Ontario Canada
6. Department of Pediatrics University of Antioquia Medellin Colombia
7. Faculty of Medicine Dalhousie University Halifax Nova Scotia Canada
8. Department of Primary Education School of Education University of Ioannina Ioannina Greece
9. Department of Thoracic Surgery and Surgical Oncology Virginia Mason Medical Center Seattle Washington USA
10. Paris Descartes University Sorbonne Paris Cité Faculté de Médecine Paris France
11. Action Against Heartburn London UK
12. Gastroesophageal Carcinogenesis Research Group Hospital del Mar Medical Research Institute (IMIM) Barcelona Spain
13. Section of Gastrointestinal Surgery Hospital Universitario del Mar Universitat Autònoma de Barcelona Barcelona Spain
14. Department of Surgery, Oncology and Gastroenterology Gastroenterology Unit University of Padua Padua Italy
15. Department of Gastroenterology and Hepatology Radboud University Medical Center Nijmegen The Netherlands
16. Wingate Institute of Neurogastroenterology Blizard Institute Barts and The London School of Medicine and Dentistry Queen Mary University of London London UK
17. Flinders University Discipline of Surgery Flinders Medical Centre Bedford Park South Australia Australia
18. Department of Surgery and Cancer Imperial College London London UK
19. European University Cyprus Nicosia Cyprus