Extract

The above article appeared in Japanese Journal of Clinical Oncology 34(7): 414–419 (2004). The authors would like to apologize for the fact that they had an almost identical manuscript published in World Journal of Surgical Oncology [Zhigang Z, Wenlv S. Prostate stem cell antigen (PSCA) expression in human prostate cancer tissues and its potential role in prostate carcinogenesis and progression of prostate cancer. World J Surg Oncol 2004, 2:13].

Please see the editorial in Japanese Journal of Clinical Oncology 35(9): 495 (2005) for details of the journal's policy on duplicate publication.

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