RT Journal Article SR Electronic T1 The neurobiology of stress and gastrointestinal disease JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 861 OP 869 DO 10.1136/gut.47.6.861 VO 47 IS 6 A1 E A MAYER YR 2000 UL http://gut.bmj.com/content/47/6/861.abstract AB