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Nintedanib plus Sildenafil in Patients with Idiopathic Pulmonary Fibrosis.
Kolb M, Raghu G, Wells AU, Behr J, Richeldi L, Schinzel B, Quaresma M, Stowasser S, Martinez FJ; INSTAGE Investigators. Kolb M, et al. N Engl J Med. 2018 Nov 1;379(18):1722-1731. doi: 10.1056/NEJMoa1811737. Epub 2018 Sep 15. N Engl J Med. 2018. PMID: 30220235 Clinical Trial.