Retraction notice to "Hypoglycemic potential of selenium nanoparticles capped with polyvinyl-pyrrolidone in streptozotocin-induced experimental diabetes in rats" [Heliyon 6 (2020) e04045]

Figure 6 Panel B (STZ group, weak insulin-immunoreactivity is exhibited in a few -cells in the islet of Langerhans in diabetic rats) from the current article and Figure 9 Panel C (Diabetic untreated control (DC) group, weak immunoreactivity to insulin is observed in a few cells in the islet of Langerhans in diabetic rats) from the article published in Biological Trace Element Research by some of the same authors of the current article and which was available online prior to the current article having been submitted to Heliyon appear to depict the same source image, but are described as representing different experimental samples.