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Hwang SK, Gwak HS, Paek SH, Kim DG, Jung HW.Hwang SK, et al.J Korean Med Sci. 2002 Aug;17(4):544-8. doi: 10.3346/jkms.2002.17.4.544.J Korean Med Sci. 2002.PMID: 12172053Free PMC article.
Hwang SK, Kim DG, Paek SH, Kim CY, Kim MK, Chi JG, Jung HW.Hwang SK, et al.Neurosurgery. 2002 Dec;51(6):1381-90; discussion 1390-1.Neurosurgery. 2002.PMID: 12445343
Hwang SK, Kim JS, Kim JH, Hong CK, Yang KH.Hwang SK, et al.J Korean Med Sci. 2012 Sep;27(9):1085-90. doi: 10.3346/jkms.2012.27.9.1085. Epub 2012 Aug 22.J Korean Med Sci. 2012.PMID: 22969257Free PMC article.Clinical Trial.