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de Kok JB, van Balken MR, Roelofs RW, van Aarssen YA, Swinkels DW, Klein Gunnewiek JM.de Kok JB, et al. Among authors: roelofs rw.Clin Chem. 2000 Dec;46(12):2003-7.Clin Chem. 2000.PMID: 11106338No abstract available.