A recent report demonstrated that HSP47 (47 kDa) may be a potential biomarker for distinguishing AE-IPF from S-IPF, and monomeric periostin (90 kDa) and latent TGF-β binding protein-2 (195–240 kDa) are useful for predicting poor prognosis in patients with IPF [9, 30]. The gene discussed is POSTN; the disease is idiopathic pulmonary fibrosis.