Authors: R W Summers; D M Switz; J T Sessions; J M Becktel; W R Best; F Kern; J W Singleton Journal: Gastroenterology Date: 1979-10 Impact factor: 22.682
Authors: R C Smith; J Rhodes; R V Heatley; L E Hughes; D L Crosby; B I Rees; H Jones; K T Evans; B W Lawrie Journal: Gut Date: 1978-07 Impact factor: 23.059