Poletti, V. and Egan, J. (2013) “Classification, natural history and staging of idiopathic pulmonary fibrosis”, Sarcoidosis, Vasculitis and Diffuse Lung Diseases, 30(Suppl 1), pp. 13–20. Available at: https://mattioli1885journals.com/index.php/sarcoidosis/article/view/3092 (Accessed: 18 July 2024).