Haematemesis and melaena with special reference to peptic ulcer.
D006396:Hematemesis / Q000209:etiology*; D006801:Humans; D008551:Melena / Q000209:etiology*; D010437:Peptic Ulcer / Q000706:statistics & numerical data*
HEMATEMESIS/etiology; MELENA/etiology; PEPTIC ULCER/statistics