RT Journal Article SR Electronic T1 Cytomegalovirus associated gastroduodenal ulceration. JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 423 OP 423 DO 10.1136/gut.30.3.423-a VO 30 IS 3 A1 Bramwell, N H YR 1989 UL http://gut.bmj.com/content/30/3/423.2.abstract AB