POT1 and idiopathic pulmonary fibrosis: Heterozygous carriage of TPP1 variants are associated with dyskeratosis congenita, bone marrow failure, and IPF (Guo et al., 2014; Hoffman et al., 2019), while homozygous carriage of a POT1 variant has been implicated in CP (Takai et al., 2016).