Other studies have also shown associations between polymorphisms in FAM13A and various lung diseases, such as idiopathic pulmonary fibrosis,31,32 asthma,33 chronic obstructive pulmonary disease (COPD),34 cystic fibrosis,35 and also increased susceptibility to silicosis.30 The gene discussed is FAM13A; the disease is chronic obstructive pulmonary disease.