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Flier SN, Kulkarni RN, Kahn CR.Flier SN, et al. Among authors: kulkarni rn.Proc Natl Acad Sci U S A. 2001 Jun 19;98(13):7475-80. doi: 10.1073/pnas.131192998. Epub 2001 Jun 12.Proc Natl Acad Sci U S A. 2001.PMID: 11404474Free PMC article.