Ussavarungsi, Kamonpun, Neal M. Patel, and Augustine S Lee. 2015. “Transbronchial Cryobiopsy in Diffuse Parenchymal Lung Disease”. The Southwest Journal of Medicine 3 (11), 8-14. https://pulmonarychronicles.com/index.php/pulmonarychronicles/article/view/214.