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Chang CP, Yen DJ, Yu SM, Liu RS, Chang HF, Hsieh HJ, Shih YH, Chu LS, Wang SJ.Chang CP, et al. Among authors: shih yh.J Formos Med Assoc. 2008 Jul;107(7):567-71. doi: 10.1016/S0929-6646(08)60170-9.J Formos Med Assoc. 2008.PMID: 18632416Free article.