title: A six month study of upper gastrointestinal haemorrhage at Singapore General Hospital.
mesh_terms: D000328:Adult; D000368:Aged; D004932:Esophageal and Gastric Varices / Q000401:mortality*; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000453:epidemiology / Q000401:mortality*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010438:Peptic Ulcer Hemorrhage / Q000401:mortality; D011446:Prospective Studies; D012846:Singapore