ROCK2 and idiopathic pulmonary fibrosis: According to the human lung cell atlas (https://asthma.cellgeni.sanger.ac.uk/) (Schiller et al., 2019) and the IPF lung cell atlas (http://www.ipfcellatlas.com/) (Adams et al., 2019), the expression of ROCK1 is much higher than ROCK2 in both pulmonary epithelial cells and stromal cells (Supplementary Figure S2).