In the article titled “A Chemically Defined Serum-Free Culture System for Spontaneous Human Mesenchymal Stem Cell Spheroid Formation” [1], there was an error in the Acknowledgments section. The corrected section appears below:


We thank the center laboratory of Peking University School and Hospital of Stomatology for providing the research facilities. This study was supported by grants from the National Natural Science Foundation of China (81870816, 81970920, 81670959, and 81801000) and Beijing Natural Science Foundation (7172240 and 7192230).