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Yang S, Hwang JS, Park HK, Lee HS, Kim HS, Kim EY, Lim JS.Yang S, et al. Among authors: park hk.PLoS One. 2012;7(12):e49253. doi: 10.1371/journal.pone.0049253. Epub 2012 Dec 14.PLoS One. 2012.PMID: 23251338Free PMC article.