PRRX1 and idiopathic pulmonary fibrosis: (A) Dot plots with median showing PRRX1a (black) and PRRX1b (white) mRNA expression relative to the siControl condition (red dashed line) in control (circle) and IPF (square) fibroblasts (n=8 per group) treated for 72 hr with PRRX1 siRNA (#1 or #2).