“Treatment Switching in Idiopathic Pulmonary Fibrosis: From Triple Therapy to Enrollment into a Clinical Investigational Drug Trial”. Sarcoidosis, Vasculitis and Diffuse Lung Diseases, vol. 30, no. Suppl 1, Sept. 2013, pp. 44-47, https://mattioli1885journals.com/index.php/sarcoidosis/article/view/3098.