Enhanced therapeutic effects of mesenchymal stem cell-derived extracellular vesicles within chitosan hydrogel in the treatment of diabetic foot ulcers. - Yang, Shuangshuang; Chen, Siyu; Zhang, Chengpeng; Han, Jing; Lin, Chunyuan; Zhao, Xiaohui; Guo, Huizhen; Tan, Yi (Journal of Materials Science: Materials in Medicine, 2023)