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Jung YJ, Kim JH, Lee HJ, Bak H, Hong SP, Jeon SY, Ahn SK.Jung YJ, et al. Among authors: ahn sk.Ann Dermatol. 2011 Feb;23(1):67-9. doi: 10.5021/ad.2011.23.1.67. Epub 2011 Feb 28.Ann Dermatol. 2011.PMID: 21738366Free PMC article.