RETRACTED ARTICLE: Exosomes derived from Fibrinogen-like protein 1-overexpressing Bone Marrow-Derived Mesenchymal Stem Cells ameliorates rheumatoid arthritis

We, the Editors and Publisher of the journal <i>Bioengineered</i>, have retracted the following article from publication. Xu, W., Liu, X., Qu, W., Wang, X., Su, H., Li, W., &amp; Cheng, Y. (2022). Exosomes derived from fibrinogen-like protein 1-overexpressing bone marrow-derived mesenchymal stem cells ameliorates rheumatoid arthritis. <i>Bioengineered</i>, 13(6), 14545–14561. https://doi.org/10.1080/21655979.2022.2090379 Since publication, significant concerns have been raised by a third party about the integrity of the data and reported results in the article. When approached for an explanation, the authors have provided their original data and answered our queries, but these do not sufficiently address the concerns. As verifying the validity of published work is core to the integrity of the scholarly record, we are therefore retracting the article. The authors have been informed of this decision. We have been informed in our decision-making by our policy on publishing ethics and integrity and COPE guidelines. The retracted article will remain online to maintain the scholarly record and will be digitally watermarked on each page as ‘Retracted’.