RT Journal Article SR Electronic T1 Barrett's oesophagus and proton pump inhibitors: a pathological perspective JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 147 OP 149 DO 10.1136/gut.46.2.147 VO 46 IS 2 A1 N A SHEPHERD YR 2000 UL http://gut.bmj.com/content/46/2/147.abstract AB