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Zhang Y, Thamer M, Cotter D, Kaufman J, Hernán MA.Zhang Y, et al. Among authors: cotter d.Clin J Am Soc Nephrol. 2009 Mar;4(3):638-44. doi: 10.2215/CJN.05071008. Epub 2009 Mar 4.Clin J Am Soc Nephrol. 2009.PMID: 19261818Free PMC article.