title: Can we currently and confidently assess the true burden of illness due to non-radiographic axial spondyloarthritis?
authors.affiliation: Department of Internal Medicine, Division of Rheumatology, Maastricht University Medical Center, The Netherlands.
authors.forename: Sjef
authors.initials: S
authors.lastname: van der Linden
authors.affiliation: Case Western Reserve University, Cleveland, OH, USA.
authors.forename: Muhammad A
authors.initials: MA
authors.lastname: Khan
mesh_terms: D017281:Cost of Illness; D006801:Humans; D012720:Severity of Illness Index; D025241:Spondylarthritis / Q000175:diagnosis*