LIF and idiopathic pulmonary fibrosis: Bleomycin increases multiple fibroproliferative chemokines and cytokines, such as CCL2, CCL5, CXCL10, CCL11, BAFF, IL-12p70, IL-2R, IL-1b, TNFa, IL-6, and LIF, as we have documented in mouse BALF and as has been observed in BALF from patients with IPF (43–50).