Leukemia, gastroduodenal ulcer, and the problem of massive upper gastrointestinal hemorrhage.
D006471:Gastrointestinal Hemorrhage; D041981:Gastrointestinal Tract; D006470:Hemorrhage; D006801:Humans; D007938:Leukemia / Q000150:complications*; D010437:Peptic Ulcer / Q000150:complications*
GASTROINTESTINAL SYSTEM/hemorrhage; HEMORRHAGE; LEUKEMIA/complications; PEPTIC ULCER/complications