R. W. Hofland, S. F. Thijsen, J. Bouwman, M. van der Wel, and A. W. Bossink, “Sarcoidosis and Purified Protein Derivative reactivity”, Sarcoidosis Vasc Diffuse Lung Dis, vol. 31, no. 2, pp. 142–148, Jul. 2014, Accessed: Jan. 19, 2026. [Online]. Available: https://mattioli1885journals.com/index.php/sarcoidosis/article/view/2894