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Bhaumik S, Walls Z, Puttaraju M, Mitchell LG, Gambhir SS.Bhaumik S, et al. Among authors: puttaraju m.Proc Natl Acad Sci U S A. 2004 Jun 8;101(23):8693-8. doi: 10.1073/pnas.0402772101. Epub 2004 May 25.Proc Natl Acad Sci U S A. 2004.PMID: 15161977Free PMC article.