Javaid, Arshad, Muhammad Amjad, Waheed Khan, Abdul Samad, Muhammad Yousaf Khan, Muhammad Sadiq, and Zia Ullah. 2011. “Pneumothorax - Is It a Different Disease in the East?”. Journal of Postgraduate Medical Institute 11 (2). https://jpmi.org.pk/index.php/jpmi/article/view/578.