Novelli, L., R. Ruggiero, F. De Giacomi, A. Biffi, P. Faverio, L. Bilucaglia, S. Gamberini, G. Messinesi, and A. Pesci. “Corticosteroid and Cyclophosphamide in Acute Exacerbation of Idiopathic Pulmonary Fibrosis: A Single Center Experience and Literature Review”. Sarcoidosis, Vasculitis and Diffuse Lung Disease, vol. 33, no. 4, Dec. 2016, pp. 385-91, https://mattioli1885journals.com/index.php/sarcoidosis/article/view/4897.