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Friedrich MG, Niendorf T, Schulz-Menger J, Gross CM, Dietz R.Friedrich MG, et al. Among authors: niendorf t.Circulation. 2003 Nov 4;108(18):2219-23. doi: 10.1161/01.CIR.0000095271.08248.EA. Epub 2003 Oct 13.Circulation. 2003.PMID: 14557359Clinical Trial.