title: Novel concepts of severity mechanisms in ankylosing spondylitis.
authors.forename: A T
authors.initials: AT
authors.lastname: Masi
authors.forename: J R
authors.initials: JR
authors.lastname: King
authors.forename: R
authors.initials: R
authors.lastname: Burgos-Vargas
mesh_terms: D006801:Humans; D012720:Severity of Illness Index; D013167:Spondylitis, Ankylosing / Q000175:diagnosis* / Q000503:physiopathology*