Assertion: pid's pid | /r/Causes | backache
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: Acute PID comes on suddenly and are often more severe, while chronic PID is a second-rate infection that may cause only mild pain and sometimes backache.
text: Acute PID comes on suddenly and tends to be more severe, whereas chronic PID is a low-grade infection that may cause only mild pain and sometimes backache.