Assertion: ankylosing spondylitis's symptom | /r/HasProperty | established
Facets:
value: as long as 8–10 years
type: TEMPORAL
value: usually
type: DEGREE
Source sentences:
text: A drawback of X-ray diagnosis is the signs and symptoms of AS have usually been established as long as 8–10 years prior to X-ray-evident changes occurring on a plain film X-ray, which means a delay of as long as 10 years before adequate therapies can be introduced.