Upper gastrointestinal bleeding. Accuracy of clinical diagnosis and prognosis.
D003951:Diagnostic Errors; D004724:Endoscopy; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis* / Q000401:mortality; D006801:Humans; D011336:Probability; D011379:Prognosis; D011446:Prospective Studies; D013997:Time Factors