Corrigendum: Human umbilical cord mesenchymal stem cell-derived exosomes promote murine skin wound healing by neutrophil and macrophage modulations revealed by single-cell RNA sequencing - Liu, Yuanyuan; Zhang, Mingwang; Liao, Yong; Chen, Hongbo; Su, Dandan; Tao, Yuandong; Li, Jiangbo; Luo, Kai; Wu, Lihua; Zhang, Xingyue; Yang, Rongya (Frontiers in Immunology, 2023)