RT Journal Article SR Electronic T1 Vaccines against gut pathogens JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 633 OP 635 DO 10.1136/gut.45.5.633 VO 45 IS 5 A1 P MASTROENI A1 F BOWE A1 R CAHILL A1 C SIMMONS A1 G DOUGAN YR 1999 UL http://gut.bmj.com/content/45/5/633.abstract AB