title: The coexistence of ochronosis and ankylosing spondylitis.
authors.forename: R
authors.initials: R
authors.lastname: Yagan
authors.forename: M A
authors.initials: MA
authors.lastname: Khan
mesh_terms: D000368:Aged; D006801:Humans; D008297:Male; D009794:Ochronosis / Q000150:complications*; D013167:Spondylitis, Ankylosing / Q000150:complications*