Iqbal, Zafar, Muhammad Imran, Azharuddin, and Shumaila Javaid. 2021. “Flexible Fiberoptic Bronchoscopy: Indications, Diagnostic Yield and Complications”. Pakistan Journal of Chest Medicine 27 (3):133-39. https://www.pjcm.net/index.php/pjcm/article/view/723.