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van Velthuysen ML, Mayen AE, van Rooijen N, Fleuren GJ, de Heer E, Bruijn JA.van Velthuysen ML, et al. Among authors: bruijn ja.Infect Immun. 1994 Aug;62(8):3230-5. doi: 10.1128/iai.62.8.3230-3235.1994.Infect Immun. 1994.PMID: 7913696Free PMC article.