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Hsiang CW, Liu CH, Fan HL, Ko KH, Yu CY, Wang HH, Liao WI, Hsu HH, Chang WC.Hsiang CW, et al. Among authors: ko kh.Yonsei Med J. 2015 Mar;56(2):519-28. doi: 10.3349/ymj.2015.56.2.519.Yonsei Med J. 2015.PMID: 25684004Free PMC article.