1 Department of Gastroenterology, Royal Infirmary of Edinburgh, Edinburgh, EH16 4SA, United Kingdom. Electronic address: alexander.robertson@nhslothian.scot.nhs.uk.
2 Department of Gastroenterology, Royal Infirmary of Edinburgh, Edinburgh, EH16 4SA, United Kingdom. Electronic address: diana.yung@nhslothian.scot.nhs.uk.
3 Department of Gastroenterology, Western General Hospital, Edinburgh, EH4 2XU, United Kingdom. Electronic address: ian.arnott@nhslothian.scot.nhs.uk.
4 Department of Gastroenterology, Royal Infirmary of Edinburgh, Edinburgh, EH16 4SA, United Kingdom. Electronic address: j.plevris@ed.ac.uk.
5 Department of Gastroenterology, Royal Infirmary of Edinburgh, Edinburgh, EH16 4SA, United Kingdom. Electronic address: Tassos.Koulaouzidis@nhslothian.scot.nhs.uk.