Abbas, Syed Ali, Ali Asghar, Syed Kashif Abbas, and Syeda Nabeera Abbas. 2018. “Prevalence of Co-Morbidities in Patients With Interstitial Lung Disease”. Pakistan Journal of Chest Medicine 24 (2):78-85. https://www.pjcm.net/index.php/pjcm/article/view/525.