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Chronic back pain in first-degree relatives (FDRs) of patients with ankylosing spondylitis: predictive value of HLA-B27 and persistence of inflammatory back pain over time

Crossref DOI link: https://doi.org/10.1136/rmdopen-2020-001418

Published Online: 2020-11-26

Published Print: 2020-11

Update policy: https://doi.org/10.1136/crossmarkpolicy

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