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Bonjer HJ, Bruining HA, Kazemier G, Lange JF, Pols HA, de Herder WW.Bonjer HJ, et al. Among authors: kazemier g.Ned Tijdschr Geneeskd. 1997 Mar 1;141(9):426-9.Ned Tijdschr Geneeskd. 1997.PMID: 9173302Dutch.