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Validation of the self-administered comorbidity questionnaire adjusted for spondyloarthritis : results from the ASAS-COMOSPA study
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Gender-attributable differences in outcome of ankylosing spondylitis : long-term results from the Outcome in Ankylosing Spondylitis International Study
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Characteristics associated with the presence and development of extra-articular manifestations in ankylosing spondylitis: 12-year results from OASIS
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Gender-attributable differences in outcome of ankylosing spondylitis: long-term results from the outcome in ankylosing spondylitis international study
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Do extra-articular manifestations influence outcome in ankylosing spondylitis?: a 12 year follow-up study