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Zwart A, Buursma A, van Kampen EJ, Zijlstra WG.Zwart A, et al. Among authors: van kampen ej.Clin Chem. 1984 Mar;30(3):373-9.Clin Chem. 1984.PMID: 6697482
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Zijlstra WG, Van Kampen EJ, Van Assendelft OW.Zijlstra WG, et al. Among authors: van assendelft ow, van kampen ej.Proc K Ned Akad Wet C. 1969;72(2):231-7.Proc K Ned Akad Wet C. 1969.PMID: 4241597No abstract available.