Chen, Wei, et al. “Clinical Profiles of 12 Chinese Patients With Diffuse Panbronchiolitis”. Sarcoidosis, Vasculitis and Diffuse Lung Diseases, vol. 30, no. 4, Dec. 2013, pp. 300-7, https://mattioli1885journals.com/index.php/sarcoidosis/article/view/2814.