Atlas of axial spondyloarthritis in Spain 2017: Study design and population Marco Garrido-Cumbrera, Victoria Navarro-Compán, Pedro Zarco, Eduardo Collantes-Estévez, David Gálvez-Ruiz, Olta Braçe, Jorge Chacón García, Carles Blanch Mur, Angels Costa Ferrer, Alvaro Hidalgo Vega, Pedro Plazuelo Ramos, Jordi Gratacós Masmitja

Prevalence of hidradenitis suppurativa in patients with axial spondyloarthritis Laura Farran Ortega, Rosa Fornons-Servent, Joan Miquel Nolla, Xavier Juanola Roura

Association between serum dickkopf-1 levels and disease duration in axial spondyloarthritis Roxana Rubio Vargas, Enrique Melguizo Madrid, Concepción González Rodríguez, Federico Navarro Sarabia, Carmen Dominguez Quesada, Rafael Ariza Ariza, Victoria Navarro Compán