1 Department of Oesophagogastric Surgery, Norfolk and Norwich University Hospital NHS Trust, Norwich, NR4 7UY, UK; University of East Anglia, Norwich Medical School, Norwich, UK. Electronic address: [email protected].
2 Department of Oesophagogastric Surgery, Norfolk and Norwich University Hospital NHS Trust, Norwich, NR4 7UY, UK.
3 Department of Oncology, Queen Elizabeth Hospital, King's Lynn, UK.
4 Department of Oncology, Norfolk and Norwich University Hospital NHS Trust, Norwich, NR4 7UY, UK.
5 Department of Oesophagogastric Surgery, Norfolk and Norwich University Hospital NHS Trust, Norwich, NR4 7UY, UK; University of East Anglia, Norwich Medical School, Norwich, UK.