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van den Bemt PM, Brodie-Meijer CC, Krijnen RM, Nieboer C.van den Bemt PM, et al. Among authors: krijnen rm.Ned Tijdschr Geneeskd. 1999 May 8;143(19):990-4.Ned Tijdschr Geneeskd. 1999.PMID: 10368719Review.Dutch.