Hagmeyer, Lars, Dirk Theegarten, Marcel Treml, Christina Priegnitz, and Winfried Randerath. 2016. “Validation of Transbronchial Cryobiopsy in Interstitial Lung Disease - Interim Analysis of a Prospective Trial and Critical Review of the Literature”. Sarcoidosis, Vasculitis and Diffuse Lung Diseases 33 (1): 2-9. https://mattioli1885journals.com/index.php/sarcoidosis/article/view/4345.