The PLOS One Editors retract this article [1] due to concerns about potential manipulation of the publication process. These concerns call into question the validity and provenance of the reported results and compliance with PLOS policies. We regret that the issues were not identified prior to the article’s publication.
RH, UYC, MM, and AMH did not agree with the retraction. SZ either did not respond directly or could not be reached.
Reference
- 1. Hasan R, Chugaeva UY, Mohammadian M, Zamanifard S, Mohammadian-Hafshejani A. RETRACTED: Cardiovascular and mortality outcomes of DPP-4 inhibitors vs. sulfonylureas as metformin add-on therapy in patients with type 2 diabetes: A systematic review and meta-analysis. PLoS One. 2025;20(5):e0321032. pmid:40323973
Citation: The PLOS One Editors (2025) Retraction: Cardiovascular and mortality outcomes of DPP-4 inhibitors vs. sulfonylureas as metformin add-on therapy in patients with type 2 diabetes: A systematic review and meta-analysis. PLoS One 20(12): e0339098. https://doi.org/10.1371/journal.pone.0339098
Published: December 17, 2025
Copyright: © 2025 The PLOS One Editors. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.