RT Journal Article SR Electronic T1 The nurse endoscopist. JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 473 OP 473 DO 10.1136/gut.38.3.473-b VO 38 IS 3 A1 A P Griffiths YR 1996 UL http://gut.bmj.com/content/38/3/473.3.abstract AB