RT Journal Article SR Electronic T1 Role of endoscopy in chronic diarrhoea when functional bowel disease is suspected JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 190 OP 191 DO 10.1136/gutjnl-2018-317730 VO 69 IS 1 A1 Ramesh P Arasaradnam A1 Julian R F Walters YR 2020 UL http://gut.bmj.com/content/69/1/190.abstract AB