Letter: the management of upper gastrointestinal hemorrhage.
D001466:Barium Sulfate; D004724:Endoscopy; D005069:Evaluation Studies as Topic; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis* / Q000628:therapy; D006801:Humans; D007902:Length of Stay; D013997:Time Factors
D001466:Barium Sulfate