MUC5B promoter variants are a dominant risk factor for the development of IPF (Moore et al. 2019; Borie et al. 2013, 2022; Seibold et al. 2011; Fingerlin et al. 2013; Zhang et al. 2011; Stock et al. 2013; Peljto et al. 2015). The gene discussed is MUC5B; the disease is idiopathic pulmonary fibrosis.