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Schwartz GJ, Work DF.Schwartz GJ, et al.Clin J Am Soc Nephrol. 2009 Nov;4(11):1832-43. doi: 10.2215/CJN.01640309. Epub 2009 Oct 9.Clin J Am Soc Nephrol. 2009.PMID: 19820136Review.