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Harmsen HJ, Raangs GC, He T, Degener JE, Welling GW.Harmsen HJ, et al. Among authors: welling gw.Appl Environ Microbiol. 2002 Jun;68(6):2982-90. doi: 10.1128/AEM.68.6.2982-2990.2002.Appl Environ Microbiol. 2002.PMID: 12039758Free PMC article.