Moreover, 12 genes from this secreted list (IGF1, LTBP1, SULF1, SFRP2, COL15A1, MMP1, CFI, COL3A1, AGER, WNT7A, CDH13, and CRTAC1) are potentially associated with pulmonary fibrosis. Here, LTBP1 is linked to pulmonary fibrosis.