@misc{7566, author = {S. Crossfield and H. Marzo-Ortega and S. Kingsbury and M. Pujades-Rodriguez and P. Conaghan}, title = {Changes in ankylosing spondylitis incidence, prevalence and time to diagnosis over two decades}, year = {2021}, journal = {RMD Open}, volume = {7}, number = {3}, issn = {2056-5933}, doi = {10.1136/rmdopen-2021-001888}, }