Ferlosio, A., and A. Orlandi. “Stem Cells, Aging and Pulmonary Vascular Remodelling”. Sarcoidosis, Vasculitis and Diffuse Lung Diseases, vol. 29, no. 2, Dec. 2012, pp. 159-60, https://mattioli1885journals.com/index.php/sarcoidosis/article/view/2513.