Gastrointestinal hemorrhage; I. Esophagus, stomach, and duodenum.
D004386:Duodenum; D004947:Esophagus; D006471:Gastrointestinal Hemorrhage; D006470:Hemorrhage; D006801:Humans; D013270:Stomach
DUODENUM/hemorrhage; ESOPHAGUS/hemorrhage; HEMORRHAGE; STOMACH/hemorrhage