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Seong MK, Kim TW.Seong MK, et al.J Korean Surg Soc. 2013 Apr;84(4):225-30. doi: 10.4174/jkss.2013.84.4.225. Epub 2013 Mar 26.J Korean Surg Soc. 2013.PMID: 23577317Free PMC article.
Seong MK.Seong MK.J Korean Med Sci. 2015 Dec;30(12):1793-9. doi: 10.3346/jkms.2015.30.12.1793. Epub 2015 Nov 30.J Korean Med Sci. 2015.PMID: 26713054Free PMC article.