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NOTICE OF DUPLICATE PUBLICATION
We wish to draw readers' attention to significant overlap between this article and one published in the December issue of the Scandinavian Journal of Rheumatology (2004;33:395-9).
The article published in Scand J Rheumatol is an earlier version which differs in certain details from that in Ann Rheum Dis. The "duplicate" submission arose from a misunderstanding among the authors.
editor Scandinavian Journal of Rheumatology
Leo van de Putte
editor Annals of the Rheumatic Diseases