1. Department of Surgery Radboud University Medical Center Nijmegen The Netherlands
2. Department of Surgery Maasziekenhuis Pantein Boxmeer Beugen The Netherlands
3. Consultant Surgeon Darent Valley Hospital Dartford UK
4. Honorary Professor of Surgery Aarhus University Hospital Aarhus Denmark
5. Department of Upper GI Surgery University Hospitals Birmingham NHS Foundation Trust Birmingham UK
6. Institute of Cancer and Genomic Sciences College of Medical and Dental Sciences University of Birmingham Birmingham UK