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Haar CH, Cobelens FG, Kalisvaart NA, van der Have JJ, van Gerven PJ, van Soolingen D.Haar CH, et al.Emerg Infect Dis. 2007 May;13(5):776-8. doi: 10.3201/eid1305.060334.Emerg Infect Dis. 2007.PMID: 17553264Free PMC article.