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Cancers 2016, 8(4), 44;

Expression of Concern
Expression of Concern: Takai, N. and Narahara, H. Epigenetic Therapy in Human Choriocarcinoma. Cancers 2010, 2, 1683–1688
MDPI AG, Klybeckstrasse 64, CH-4057 Basel, Switzerland
Academic Editor: Samuel C. Mok
Received: 6 April 2016 / Accepted: 6 April 2016 / Published: 7 April 2016
We wish to make readers aware that text in [1] has been taken from other publications by the same author. In particular, much of Section 1, the first part of Section 2 and the first sentence of Section 3 are copied verbatim from [2]. Table 1 and the second part of Section 2 are taken from [3]. The main novel contribution of [1] lies in Section 3. We regret that these issues were not picked up before publication and wish to apologize to readers of Cancers.


  1. Takai, N.; Narahara, H. Epigenetic therapy in human choriocarcinoma. Cancers 2010, 2, 1683–1688. [Google Scholar] [CrossRef] [PubMed]
  2. Takai, N.; Narahara, H. Histone deacetylase inhibitor therapy in epithelial ovarian cancer. J. Oncol. 2010, 2010, 458431. [Google Scholar] [CrossRef] [PubMed]
  3. Takai, N.; Narahara, H. Preclinical studies of chemotherapy using histone deacetylase inhibitors in endometrial cancer. Obstet. Gynecol. Int. 2010, 2010, 923824. [Google Scholar] [CrossRef] [PubMed]
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