Asymptomatic gastric damage by drugs.
D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000009:adverse effects*; D001241:Aspirin / Q000009:adverse effects; D006801:Humans; D013276:Stomach Ulcer / Q000139:chemically induced*
D000894:Anti-Inflammatory Agents, Non-Steroidal; D001241:Aspirin