RT Journal Article SR Electronic T1 Descartes and the gut: “I'm pink therefore I am” JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 165 OP 166 DO 10.1136/gut.49.2.165 VO 49 IS 2 A1 D G THOMPSON YR 2001 UL http://gut.bmj.com/content/49/2/165.abstract AB