1. Department of Surgery, Queen Elizabeth Hospital Birmingham, University Hospital Birmingham NHS Trust, Birmingham, UK
2. Northern Oesophagogastric Unit, Royal Victoria Infirmary, Newcastle University Trust Hospitals, Newcastle upon Tyne, UK
3. Institute of Cancer and Genomic Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
4. Department of Surgery, Icahn School of Medicine at Mount Sinai, New York, New York, USA
5. Department of Surgery and Cancer, Imperial College London, London, UK
6. Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden