MRTFA and pulmonary fibrosis: This report was followed by a string of studies that implicate MKL1 in the regulation of pulmonary fibrosis (Zhou et al., 2013), scleroderma (Shiwen et al., 2015), liver fibrosis (Fan et al., 2015; Tian et al., 2015; Wu X. et al., 2020), renal fibrosis (Xu et al., 2015; Mao et al., 2020b), and intestinal fibrosis (Johnson et al., 2014).