Biological Nanotherapeutics Derived From Human Umbilical Cord Mesenchymal Stem Cells: Mechanisms and Translational Potential in Multisystem Therapies for Regeneration and Oncology Ruirui Zhang, Zhipeng Xu, Shijie Xu, Rong Li, Hui Qian International Journal of Nanomedicine.2025; Volume 20: 12117. CrossRef