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Kim SK, Pak HN, Park JH, Ko KJ, Lee JS, Wi J, Choi JI, Kim YH.Kim SK, et al. Among authors: choi ji.Korean Circ J. 2010 Apr;40(4):185-90. doi: 10.4070/kcj.2010.40.4.185. Epub 2010 Apr 22.Korean Circ J. 2010.PMID: 20421959Free PMC article.Retracted.