Landewé RB, van der Heijde D, Dougados M, et al. Maintenance of clinical remission in early axial spondyloarthritis following certolizumab pegol dose reduction. Ann of Rheum Dis 2020;79:920–8

A citation to the following paper should be included after first mention of the copyrighted SPARCC instrument: Maksymowych WP, et al. Spondyloarthritis Research Consortium of Canada magnetic resonance imaging index for assessment of sacroiliac joint inflammation in ankylosing spondylitis. Arthritis Rheum 2005;53(5):703–9. doi: 10.1002/art.21445.