RT Journal Article SR Electronic T1 Mucosal biopsy of the gastrointestinal tract JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 750 OP 750 DO 10.1136/gut.27.6.750 VO 27 IS 6 A1 Thompson, H YR 1986 UL http://gut.bmj.com/content/27/6/750.1.abstract AB