RT Journal Article SR Electronic T1 Atlas on left hemicolectomy JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1521 OP 1522 DO 10.1136/gut.27.12.1521-b VO 27 IS 12 A1 Johnson, A G YR 1986 UL http://gut.bmj.com/content/27/12/1521.3.abstract AB