RT Journal Article SR Electronic T1 Functional Gastrointestinal Disorders JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 320 OP 320 DO 10.1136/gut.36.2.320 VO 36 IS 2 A1 Whorwell, P J YR 1995 UL http://gut.bmj.com/content/36/2/320.1.abstract AB