RT Journal Article SR Electronic T1 Gastrointestinal surgery in old age: issues of equality and quality JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 427 OP 429 DO 10.1136/gut.41.4.427 VO 41 IS 4 A1 SEYMOUR, D GWYN YR 1997 UL http://gut.bmj.com/content/41/4/427.abstract AB