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There was an error in an author name in a letter published in the July issue (Tsavaris N, Mavragani CP, Dimitrios P. Rheumatoid arthritis: correlation between rheumatoid factor levels and CA-125 tumour marker elevation. Ann Rheum Dis 2007;66:980.) The correct author list is as follows: Tsavaris N, Mavragani CP, Pikazis D.
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