Human skin scRNA-seq datasets were integrated from GSE144240 (Ji et al., 2020), GSE129611 (Takahashi et al., 2020), and other processed data courtesy of Professors J. Cheng (Cheng et al., 2018), and R. Lafyatis (Tabib et al., 2018). Mouse skin scRNA-seq datasets were integrated from GSE129218 (Joost et al., 2020) and GSE142471 (Haensel et al., 2020).