1 Gastrointestinal Surgery, Nottingham Digestive Diseases Centre and National Institute for Health Research (NIHR) Biomedical Research Centre, Queens Medical Centre, Nottingham, NG7 2UH, UK.
2 Gastrointestinal Surgery, Nottingham Digestive Diseases Centre and National Institute for Health Research (NIHR) Biomedical Research Centre, Queens Medical Centre, Nottingham, NG7 2UH, UK. Alfie.adiamah@doctors.org.uk.