Kruit, A., Gerritsen, W., & Pot, et al., N. (2010). CA 15-3 as an alternative marker for KL-6 in fibrotic lung diseases. Sarcoidosis, Vasculitis and Diffuse Lung Diseases, 27(2), 138-146. https://mattioli1885journals.com/index.php/sarcoidosis/article/view/2579