Choi, J., Hoffman, L., & Sethi, et al., J. (2009). Multiple flow rates measurement of exhaled nitric oxide in patients with sarcoidosis: a pilot feasibility study. Sarcoidosis, Vasculitis and Diffuse Lung Diseases, 26(2), 98-109. https://mattioli1885journals.com/index.php/sarcoidosis/article/view/2596