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Jeong SM, Kim TY, Jeong YB, Sim JY, Choi IC.Jeong SM, et al. Among authors: sim jy.J Korean Med Sci. 2006 Oct;21(5):917-21. doi: 10.3346/jkms.2006.21.5.917.J Korean Med Sci. 2006.PMID: 17043429Free PMC article.