The concept of axial spondyloarthritis: joint statement of the spondyloarthritis research and treatment network and the Assessment of SpondyloArthritis international Society in response to the US Food and Drug Administration's comments and concerns.

Deodhar A, Reveille JD, van den Bosch F, Braun J, Burgos-Vargas R, Caplan L, Clegg DO, Colbert RA, Gensler LS, van der Heijde D, van der Horst-Bruinsma IE, Inman RD, Maksymowych WP, Mease PJ, Raychaudhuri S, Reimold A, Rudwaleit M, Sieper J, Weisman MH, Landewé RB