S. Pouwels-Fry, S. Pouwels, and C. Fournier, et al., “Effects of oxygen on exercise-induced increase of pulmonary arterial pressure in idiopathic pulmonary fibrosis”, Sarcoidosis Vasc Diffuse Lung Dis, vol. 25, no. 2, pp. 133–139, Dec. 2008, Accessed: Jan. 31, 2025. [Online]. Available: https://mattioli1885journals.com/index.php/sarcoidosis/article/view/2633