RT Journal Article SR Electronic T1 The Esophagogastric Junction JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 579 OP 579 DO 10.1136/gut.44.4.579-i VO 44 IS 4 A1 A J P M SMOUT YR 1999 UL http://gut.bmj.com/content/44/4/579.11.abstract AB