Several polymorphic variants in the TGF-β1 gene were examined in pulmonary diseases, such as chronic obstructive pulmonary disease (COPD)[9], asthma[10], idiopathic pulmonary fibrosis (IPF)[11], and cystic fibrosis (CF)[12]. The gene discussed is TGFB1; the disease is idiopathic pulmonary fibrosis.