While smoking (3) and the inhalation of silica (4) are well-known environmental factors that cause idiopathic pulmonary fibrosis (IPF), several genetic variants for surfactant protein-C, surfactant protein-A2, telomerase reverse transcriptase, telomerase RNA component, and MUC5B have been identified as factors associated with IPF or familial interstitial pulmonary fibrosis (5–8). This evidence concerns the gene SFTPC and idiopathic pulmonary fibrosis.