Correction: Cell Regen 11, 29 (2022)

https://doi.org/10.1186/s13619-022-00130-x

Following publication of the original article (Xu and Ou 2022), it is reported that the supplement figure S1-S5 were missing from the article. Additional file 1: Fig. S1 contains only figure legends but no figures.

The original article (Xu and Ou 2022) has been corrected.