Non‐radiographic axial spondyloarthritis in South America. Burden of disease and differential features with respect to ankylosing spondylitis at time of diagnosis. A comprehensive analysis with a focus on images. - Garcia Salinas, Rodrigo; Jaldin Cespedes, Rosario; Gomez, Ramiro Adrian; Aguerre, Dario; Sommerfleck, Fernando (International Journal of Rheumatic Diseases, 2022)