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APA Citation
Behr, J., Nathan, S. D., Wuyts, W. A., Mogulkoc Bishop, N., Bouros, D. E., Antoniou, K., Guiot, J., Kramer, M. R., Kirchgaessler, K., Bengus, M., Gilberg, F., Perjesi, A., Harari, S., & Wells, A. U. (2021). efficacy and safety of sildenafil added to pirfenidone in patients with advanced idiopathic pulmonary fibrosis and risk of pulmonary hypertension: a double-blind, randomised, placebo-controlled, phase 2b trial. Lancet, 9(1), 85–95. http://access.bl.uk/ark:/81055/vdc_100119752254.0x000008