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Lim KM, Lee JS, Song JH, Youn CH, Choi JS, Shim EB.Lim KM, et al. Among authors: choi js.J Korean Med Sci. 2011 Dec;26(12):1591-8. doi: 10.3346/jkms.2011.26.12.1591. Epub 2011 Nov 29.J Korean Med Sci. 2011.PMID: 22147996Free PMC article.
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Kim YT, Lee JS, Youn CH, Choi JS, Shim EB.Kim YT, et al. Among authors: choi js.J Korean Med Sci. 2013 Aug;28(8):1161-8. doi: 10.3346/jkms.2013.28.8.1161. Epub 2013 Jul 31.J Korean Med Sci. 2013.PMID: 23960442Free PMC article.