RETRACTION: Exosomes Derived From SDF1‐Overexpressing Mesenchymal Stem Cells Inhibit Ischemic Myocardial Cell Apoptosis and Promote Cardiac Endothelial Microvascular Regeneration in Mice With Myocardial Infarction

RETRACTION: X.‐H. Gong, H. Liu, S.‐J. Wang, S.‐W. Liang, and G.‐G. Wang, “Exosomes Derived From SDF1‐Overexpressing Mesenchymal Stem Cells Inhibit Ischemic Myocardial Cell Apoptosis and Promote Cardiac Endothelial Microvascular Regeneration in Mice With Myocardial Infarction.” Journal of Cellular Physiology 234, no. 8 (2019): 13878–13893. https://doi.org/10.1002/jcp.28070 . The above article, published online on February 5, 2019, in Wiley Online Library ( wileyonlinelibrary.com ), has been retracted by agreement between the authors; the journal Editor‐in‐Chief, Robert Heath, and Wiley Periodicals LLC. A third party shared a report from the National Natural Science Foundation of China, which indicated that data in this article had been purchased from an external company (National Natural Science Foundation of China 2015). An investigation by the publisher found that this fact is not reported in the article and also that the article is missing necessary information on the ethical approval for animal and human experiments performed as part of this study. The authors responded to an inquiry by the publisher requesting original data and evidence of approval for animal and human experiments. The authors stated that they conducted partial pre‐experiments and then commissioned third‐party companies to conduct the main experiments. The authors further stated that those companies could not provide raw data. The authors did not provide information regarding ethical approval for the animal and human experiments reported in the article. The authors requested the withdrawal of their article. The retraction has been agreed to because the data and ethical approval of experiments reported in this article cannot be validated.