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Chang SA, Choi SI, Choi EK, Kim HK, Jung JW, Chun EJ, Kim KS, Cho YS, Chung WY, Youn TJ, Chae IH, Choi DJ, Chang HJ.Chang SA, et al. Among authors: chun ej.Am Heart J. 2008 Aug;156(2):375-83. doi: 10.1016/j.ahj.2008.03.016. Epub 2008 May 14.Am Heart J. 2008.PMID: 18657674Clinical Trial.
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