RT Journal Article SR Electronic T1 Open questions in oesophageal adenocarcinogenesis JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 897 OP 898 DO 10.1136/gut.2006.117135 VO 56 IS 7 A1 Carlo C Maley YR 2007 UL http://gut.bmj.com/content/56/7/897.1.abstract AB