title: Advances in gastroenterology. Introduction.
authors.affiliation: Department of Medicine, Hospital of University of Pennsylvania, University of Pennsylvania School of Medicine, University of Pennsylvia Health System, Philadelphia 19104-4283, USA.
authors.forename: G R
authors.initials: GR
authors.lastname: Lichtenstein
mesh_terms: D005762:Gastroenterology / Q000639:trends; D005767:Gastrointestinal Diseases / Q000175:diagnosis / Q000209:etiology / Q000503:physiopathology / Q000628:therapy; D006801:Humans