OL Oncology Letters 1792-1074 1792-1082 D.A. Spandidos 10.3892/ol.2026.15624 OL-32-1-15624 Expression of Concern [Expression of Concern] In vitro and in vivo inhibition of tumor cell viability by combined dihydroartemisinin and doxorubicin treatment, and the underlying mechanism TaiXiang CaiXiao-Bei ZhangZhang WeiRui 072026 28042026 32 1 269 Copyright: © 2026 Tai et al. 2026 This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.

Oncol Lett 12: 3701–3706, 2016; DOI: 10.3892/ol.2016.5187

Following the publication of the above paper, it has been drawn to the Editor's attention by a concerned reader that, regarding the images in Fig. 7 on p. 978 showing hematoxylin and eosin-stained images of the spleen, liver, kidney and heart sections of the mice employed in this study, the Liver/Control and Liver/DOX panels were strikingly similar in appearance.

The authors have been contacted by the Editorial Office to offer an explanation for this apparent anomaly in the presentation of the data in this paper, and we are awaiting their response. Owing to the fact that the Editorial Office has been made aware of potential issues surrounding the scientific integrity of this paper, we are issuing an Expression of Concern to notify readers of these potential problems while the Editorial Office continues to investigate this matter further.