RT Journal Article SR Electronic T1 Viral Hepatitis: Etiology, Epidemiology, Pathogenesis and Prevention JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 348 OP 348 DO 10.1136/gut.20.4.348 VO 20 IS 4 A1 Sherlock, Sheila YR 1979 UL http://gut.bmj.com/content/20/4/348.1.abstract AB