TINF2 and idiopathic pulmonary fibrosis: Moreover, four patients with f-IPF had rare mutations in the telomere-related T cell receptor gamma locus (TRG) gene (potential risk of pathogenicity: TERT, TERC, DCK1, PARN, RTEL1, and TINF2), suggesting that telomere dysfunction is associated with adverse outcomes after transplantation.