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van der Vlist GJ, Gerards LJ, Sybrandy R, Huysmans HA.van der Vlist GJ, et al. Among authors: sybrandy r.Ned Tijdschr Geneeskd. 1977 Oct 8;121(41):1595-7.Ned Tijdschr Geneeskd. 1977.PMID: 904714Dutch.No abstract available.