Wu C, Ding W, Li Q, Wang W, Deng M, Jin R, Pang B, Yang X. The correlation between pulmonary fibrosis and methylation of peripheral Smad3 in cases of pigeon breeder’s lung in a Chinese Uygur population. Oncotarget. 2017 May 10;8(26):43104–13. doi: 10.18632/oncotarget.17763.