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Drotschmann K, Clark AB, Tran HT, Resnick MA, Gordenin DA, Kunkel TA.Drotschmann K, et al. Among authors: tran ht.Proc Natl Acad Sci U S A. 1999 Mar 16;96(6):2970-5. doi: 10.1073/pnas.96.6.2970.Proc Natl Acad Sci U S A. 1999.PMID: 10077621Free PMC article.