Elfferich, M., De Vries, J., & Drent, M. (2011). Type D or “distressed” personality in sarcoidosis and idiopathic pulmonary fibrosis. Sarcoidosis, Vasculitis and Diffuse Lung Diseases, 28(1), 65-71. https://mattioli1885journals.com/index.php/sarcoidosis/article/view/2623