FBL and idiopathic pulmonary fibrosis: Using GFP-transduced fibroblasts, we found that the overall fluorescence was significantly increased by IPF-ABCs in healthy (HV-Fib) as well as IPF fibroblasts (IPF-Fib) (P = 0.005 and P = 0.002, respectively, Fig. 2j, k), potentially reflecting enhanced proliferation.