Spondyloarthropathy (SpA) is a group of multi-systemic diseases, whose pathogenesis is not known, characterized by spinal inflammation, peripheral arthritis, and with a lower frequency by extra-articular involvement. Brevverton and Schlosstein introduced the relationship between HLA-B27 and the disease. Along with HLA-
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.