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Jin HR, Lee JY, Lee DW, Shin SO, Choi YS, Yoo SJ, Yoon TY.Jin HR, et al. Among authors: choi ys.J Korean Med Sci. 2005 Apr;20(2):279-82. doi: 10.3346/jkms.2005.20.2.279.J Korean Med Sci. 2005.PMID: 15832001Free PMC article.
Jeon CW, Choo MJ, Bae IH, Shin SO, Choi YS, Lee DW, Sim KH.Jeon CW, et al. Among authors: choi ys.Yonsei Med J. 2002 Jun;43(3):329-34. doi: 10.3349/ymj.2002.43.3.329.Yonsei Med J. 2002.PMID: 12089740Free article.
Jin HR, Yeon JY, Shin SO, Choi YS, Lee DW.Jin HR, et al. Among authors: choi ys.Otolaryngol Head Neck Surg. 2007 Jan;136(1):38-44. doi: 10.1016/j.otohns.2006.08.027.Otolaryngol Head Neck Surg. 2007.PMID: 17210331
Park KH, Lee SH, Koo JW, Park HY, Lee KY, Choi YS, Oh KW, Lee A, Yang JE, Woo SY, Kim SW, Cho YS.Park KH, et al. Among authors: choi ys.J Epidemiol. 2014;24(5):417-26. doi: 10.2188/jea.je20140024. Epub 2014 Jun 21.J Epidemiol. 2014.PMID: 24953134Free PMC article.