Crestani, B. “Molecular Biomarkers in Idiopathic Pulmonary Fibrosis and Disease Severity”. Sarcoidosis, Vasculitis and Diffuse Lung Disease, vol. 30, no. Suppl 1, Sept. 2013, pp. 27-32, https://mattioli1885journals.com/index.php/sarcoidosis/article/view/3094.