Abstract
Expression of concern for 'Investigation of the biological activity, mechanical properties and wound healing application of a novel scaffold based on lignin-agarose hydrogel and silk fibroin embedded zinc chromite nanoparticles' by Reza Eivazzadeh-Keihan et al., RSC Adv., 2021, 11, 17914-17923, https://doi.org/10.1039/D1RA01300A.