López-Medina, C., A. Molto, J. Sieper, T. Duruöz, U. Kiltz, B. E. Zorkany, N. Hajjaj-Hassouni, R. Burgos-Vargas, J. Maldonado-Cocco, N. Ziade, et al.,  "Prevalence and distribution of peripheral musculoskeletal manifestations in spondyloarthritis including psoriatic arthritis: results of the worldwide, cross-sectional ASASPerSpA study",  Rheumatic & Musculoskeletal Disease (RMD), vol. 7 , issue 1, pp. 1 - 12, 2021.