The phenotype of axial spondyloarthritis: is it dependent on HLA‐B27 status? by Coates, LC, Baraliakos, X, Blanco Garcia, F, Blanco-Morales, E, Braun, J, Chandran, V, Fernandez-Sueiro, JL, FitzGerald, O, Gallagher, P, Gladman, DD, Gubar, E, Korotaeva, T, Loginova, E, Lubrano, E, Mulero, J, Pinto, J, Queiro, R, Sanz, J, Szentpetery, A, Helliwell, PS