Adrian C Bateman is a Consultant in Histopathology at University Hospital Southampton, UK. Joel K Greenson is Professor of Pathology at the University of Michigan, USA. Gregory Y Lauwers is Professor of Pathology at Harvard Medical School, USA. Maurice B Loughrey is a consultant gastrointestinal pathologist in the Royal Victoria Hospital, Belfast, UK. Marco R Novelli is Professor of GI Pathology and Consultant Histopathologist, University College London Hospital, UK. Kieran Sheahan is Consultant Histopathologist at St. Vincent’s University Hospital, Dublin, Ireland. Neil A Shepherd is Professor of Gastrointestinal Pathology and Consultant Histopathologist at Gloucestershire Royal and Cheltenham General Hospitals, Gloucestershire, England, UK.