Assertion: ankylosing spondylitis's condition | /r/HasProperty | common
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Source sentences:
text: Of course, because both conditions are common, you can also have osteoarthritis and fibromyalgia, notes Dr. Borenstein.
text: Ankylosing spondylitis is considered a common condition, affecting 2 to 3 million Americans with around 20,000 new diagnoses each year.