EARLY DIAGNOSIS IN ACUTE UPPER GASTRO-INTESTINAL BLEEDING.
D000208:Acute Disease; D042241:Early Diagnosis; D004945:Esophagoscopy; D006471:Gastrointestinal Hemorrhage; D005773:Gastroscopy; D006470:Hemorrhage; D006801:Humans
ESOPHAGOSCOPY; GASTROSCOPY; HEMORRHAGE, GASTROINTESTINAL