title: Reply to the editorial: Can we currently and confidently assess the true burden of illness due to non-radiographic axial spondyloarthritis? by S. van der Linden and M.A. Khan.
authors.affiliation: Rheumatology, Campus Benjamin Franklin, Berlin, Germany. joachim.sieper@charite.de.
authors.forename: Joachim
authors.initials: J
authors.lastname: Sieper
authors.affiliation: Health Economics and Outcomes Research, Adelphi Real World, Macclesfield, UK.
authors.forename: Robert
authors.initials: R
authors.lastname: Wood
authors.affiliation: Center for Observational and Real-World Evidence, Merck & Co., Inc., Kenilworth, NJ, USA.
authors.forename: Sumesh
authors.initials: S
authors.lastname: Kachroo
mesh_terms: D017281:Cost of Illness; D006801:Humans; D025241:Spondylarthritis