RT Journal Article SR Electronic T1 Helicobacter pylori and peptic ulcers: the present position. JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 289 OP 292 DO 10.1136/gut.33.3.289 VO 33 IS 3 A1 Moss, S A1 Calam, J YR 1992 UL http://gut.bmj.com/content/33/3/289.abstract AB