RT Journal Article SR Electronic T1 The role of psychosocial factors in gastrointestinal disorders JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP iv73 OP iv75 DO 10.1136/gut.47.suppl_4.iv73 VO 47 IS suppl 4 A1 I Wilhelmsen YR 2000 UL http://gut.bmj.com/content/47/suppl_4/iv73.abstract AB