RT Journal Article SR Electronic T1 Classical signs: modern imaging JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1369 OP 1369 DO 10.1136/gut.2005.068338 VO 54 IS 10 A1 Groves, A M A1 Balan, K K YR 2005 UL http://gut.bmj.com/content/54/10/1369.abstract AB