Biswas, Abhishek, and Michael P Donahoe. 2014. “The Many Faces of Pulmonary Langerhans Cell Histiocytosis”. Sarcoidosis, Vasculitis and Diffuse Lung Diseases 31 (3): 244-48. https://mattioli1885journals.com/index.php/sarcoidosis/article/view/3308.