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: J W Singleton; S B Hanauer; G L Gitnick; M A Peppercorn; M G Robinson; L D Wruble; E L Krawitt Journal: Gastroenterology Date: 1993-05 Impact factor: 22.682