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Rothschild, B.M. Re: “Coexisting seronegative rheumatoid arthritis and ankylosing spondylitis”. Clin Rheumatol 23, 564 (2004). https://doi.org/10.1007/s10067-004-0945-0
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DOI: https://doi.org/10.1007/s10067-004-0945-0