Lorenzin, M., A. Ortolan, P. Frallonardo, S. Vio, C. Lacognata, F. Oliviero, L. Punzi, and R. Ramonda. “Spine and Sacroiliac Joints on Magnetic Resonance Imaging in Patients With Early Axial Spondyloarthritis: Prevalence of Lesions and Association With Clinical and Disease Activity Indices from the Italian Group of the SPACE Study”. Reumatismo 68, no. 2 (September 9, 2016): 72-82. Accessed August 3, 2020. https://www.reumatismo.org/index.php/reuma/article/view/885.