Malik, Muhammad Irfan, Khalid Waheed, and Arslan Iqbal. 2020. “Orthopnea: This Time It Is Not the Heart Failure; A Rare Case of Bilateral Diaphragmatic Paralysis”. Pakistan Journal of Chest Medicine 26 (3):150-51. http://www.pjcm.net/index.php/pjcm/article/view/656.