RT Journal Article SR Electronic T1 Enterobius vermicularis infection. JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 1159 OP 1162 DO 10.1136/gut.35.9.1159 VO 35 IS 9 A1 G C Cook YR 1994 UL http://gut.bmj.com/content/35/9/1159.abstract AB