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Cheng JS, Wu DB, Wen YW, Liu PH, Lin JR, Chang CJ.Cheng JS, et al.J Formos Med Assoc. 2012 Jun;111(6):300-4. doi: 10.1016/j.jfma.2011.12.011. Epub 2012 Apr 20.J Formos Med Assoc. 2012.PMID: 22748619Free article.Review.