The retracted articles, "The cardioprotective effects of a combination of quercetin and α-tocopherol on isoproterenol-induced myocardial infarcted rats," and "Protective effects of caffeic acid on lactate dehydrogenase isoenzymes, electrocardiogram, adenosine triphosphatases, and hematology on isoproterenol-induced myocardial infarcted rats," both appeared in the journal Journal of Biochemical and Molecular Toxicology in 2011, but in different issues.
In 2020, Elisabeth Bik posted about the papers on PubPeer, pointing out figures in the articles were "unexpectedly similar" to each other. The journal published nearly identical retraction notices in September, and corrections a month later. The corrections stated: "In the previously published retraction note, the reasons for the retraction were described inaccurately, and the authors’ disapproval of the retraction was not reflected. This has now been addressed and corrected."
