Assertion: ankylosing spondylitis | /r/HasProperty | challenge
Facets:
value: traditionally
type: OTHER
Source sentences:
text: Ankylosing spondylitis, an inflammatory arthritis and autoimmune condition, has traditionally been a challenge to diagnose.
text: Ankylosing spondylitis is a challenging disease that can cause severe back pain and if left untreated, can significantly impact patient mobility,' said Rebecca Morison, vice president, U.S.