RT Journal Article SR Electronic T1 Collagenous colitis in adult Sri Lankans: experience from the Indian subcontinent JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 436 OP 436 DO 10.1136/gut.2005.084681 VO 55 IS 3 A1 R L Satarasinghe A1 H R R Fernando A1 D H Jayamaha A1 I Samarasinghe A1 A P De Silva YR 2006 UL http://gut.bmj.com/content/55/3/436.abstract AB