Aspirin, gastrointestinal bleeding, and peptic ulcer.
D001241:Aspirin / Q000633:toxicity*; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006470:Hemorrhage; D006801:Humans; D010437:Peptic Ulcer / Q000209:etiology*; D010438:Peptic Ulcer Hemorrhage / Q000209:etiology*
D001241:Aspirin
ACETYLSALICYLIC ACID/toxicology; HEMORRHAGE, GASTROINTESTINAL/etiology; PEPTIC ULCER HEMORRHAGE/etiology; PEPTIC ULCER/etiology