title: Upper gastrointestinal hemorrhage--comparison of the causes and prognosis in primary and secondary bleeders.
authors.forename: M W
authors.initials: MW
authors.lastname: Lievens
authors.forename: S M
authors.initials: SM
authors.lastname: Schutz
mesh_terms: D015897:Comorbidity; D006471:Gastrointestinal Hemorrhage / Q000453:epidemiology / Q000209:etiology / Q000503:physiopathology; D006801:Humans; D011379:Prognosis