Supplemental material, sj-docx-1-tab-10.1177_1759720X221085951 for Validation of the ASDAS with a quick quantitative CRP assay (ASDAS-Q) in patients with axial SpA: a prospective multicentre cross-sectional study by Fabian Proft, Julia Schally, Henning Christian Brandt, Jan Brandt-Juergens, Gerd Rüdiger Burmester, Hildrun Haibel, Henriette Käding, Kirsten Karberg, Susanne Lüders, Burkhard Muche, Mikhail Protopopov, Judith Rademacher, Valeria Rios Rodriguez, Murat Torgutalp, Maryna Verba, Silke Zinke and Denis Poddubnyy in Therapeutic Advances in Musculoskeletal Disease