TGFB1 and pulmonary fibrosis: The development of severe pulmonary fibrosis resembling the human disease in mice with lung-specific overexpression of human TGFβ1 is the proof-of-concept of the pivotal role of TGFβ1 in pulmonary fibrosis (D'Alessandro-Gabazza et al., 2012; Fujiwara et al., 2017; D'Alessandro-Gabazza et al., 2018).