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Zeymer U, Schröder R, Machnig T, Neuhaus KL.Zeymer U, et al. Among authors: machnig t.Am Heart J. 2003 Oct;146(4):686-91. doi: 10.1016/S0002-8703(03)00326-0.Am Heart J. 2003.PMID: 14564324Clinical Trial.