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Chen C, Chang YC, Liu CL, Chang KJ, Guo IC.Chen C, et al. Among authors: chang kj, chang yc.Breast Cancer Res Treat. 2006 Jul;98(2):121-32. doi: 10.1007/s10549-005-9139-y. Epub 2006 Jun 3.Breast Cancer Res Treat. 2006.PMID: 16752079
Cheng SP, Chang YC, Liu CL, Yang TL, Jeng KS, Lee JJ, Liu TP.Cheng SP, et al. Among authors: chang yc.Surg Endosc. 2008 May;22(5):1283-9. doi: 10.1007/s00464-007-9610-4. Epub 2007 Oct 30.Surg Endosc. 2008.PMID: 17968623