Assertion: morphine's use | /r/HasSubevent | less gastric ulceration
Facets:
Source sentences:
text: Because COX-2 is not normally expressed in the stomach , the use of COX-2 inhibitors (e.g., rofecoxib, celecoxib) seems to result in less gastric ulceration than occurs with other anti-inflammatory analgesics, particularly aspirin.