RT Journal Article SR Electronic T1 Clinical investigation of gastrointestinal function JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 716 OP 716 DO 10.1136/gut.23.8.716-a VO 23 IS 8 A1 Sherlock, Sheila YR 1982 UL http://gut.bmj.com/content/23/8/716.2.abstract AB