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Chen CC, Ku MC, D M J, Lai JS, Hueng DY, Chang C.Chen CC, et al. Among authors: chang c.PLoS One. 2013;8(2):e56125. doi: 10.1371/journal.pone.0056125. Epub 2013 Feb 28.PLoS One. 2013.PMID: 23468856Free PMC article.