RT Journal Article SR Electronic T1 Multimedia Medicine. Essentials in Gastroenterology I—Peptic Ulcer JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 439 OP 439 DO 10.1136/gut.44.3.439-f VO 44 IS 3 A1 R G SHIDRAWI YR 1999 UL http://gut.bmj.com/content/44/3/439.6.abstract AB