1. Department of Gastroenterology, Guy’s and St Thomas’ Hospitals NHS Foundation Trust, London, United Kingdom
2. Department of Gastroenterology, Lewisham University Hospital, London, United Kingdom
3. Department of Histopathology, Lewisham University Hospital, London, United Kingdom
4. Department of Histopathology, Guy’s and St Thomas’ Hospitals NHS Foundation Trust, London, United Kingdom
5. Institute of Medical Informatics, Oslo University Hospital, Norway