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Leden I, Hanson A, Melander A, Sturfelt G, Svensson B, Wàhlin-Boll E.Leden I, et al.Scand J Rheumatol. 1981;10(3):253-5. doi: 10.3109/03009748109095308.Scand J Rheumatol. 1981.PMID: 7291958
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