Ethics approval and consent to participate
Written informed consent for study participation was obtained from each subject according to local institutional policy at Royal Prince Alfred Hospital, Sydney, Australia (Protocol X15-0454 and HREC/11/RPAH/444), St Vincent’s Hospital, Sydney, Australia (HREC/13/SVH/145), Westmead Hospital, Sydney, Australia (HREC/14/WMEAD/324(4081)), Oxford Centre for Histopathology Research (16/A019 and18/A064) and Oxford GI Biobank (REC16/YH/0247),Oxford, United Kingdom and Liverpool Hospital, Liverpool, United Kingdom (12/NW/0525).