AUTHOR=Pei Yixuan Amy , Dong Yufeng , He Tong-Chuan , Li Wan-Ju , Toh Wei Seong , Pei Ming TITLE=Editorial: Extracellular Vesicle Treatment, Epigenetic Modification and Cell Reprogramming to Promote Bone and Cartilage Regeneration JOURNAL=Frontiers in Bioengineering and Biotechnology VOLUME=9 YEAR=2021 URL=https://www.frontiersin.org/journals/bioengineering-and-biotechnology/articles/10.3389/fbioe.2021.678014 DOI=10.3389/fbioe.2021.678014 ISSN=2296-4185