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van der Zee JM, Heurkens AH, van der Voort EA, Daha MR, Breedveld FC.van der Zee JM, et al. Among authors: heurkens ah.Clin Exp Rheumatol. 1991 Nov-Dec;9(6):589-94.Clin Exp Rheumatol. 1991.PMID: 1764841