Ricci, A., et al. “Serum CA 15-3 Is Increased in Pulmonary Fibrosis”. Sarcoidosis, Vasculitis and Diffuse Lung Diseases, vol. 26, no. 1, June 2009, pp. 54-63, https://mattioli1885journals.com/index.php/sarcoidosis/article/view/2612.