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