Hussain, Niaz, and Aneeqa Ahsan Zafar. 2015. “INCIDENTAL FINDING OF COLOPLEURAL FISTULA DURING PLEUROCUTANEOUS WINDOW SURGERY FOR EMPYEMA THORACIS”. Pakistan Journal of Chest Medicine 20 (4). http://www.pjcm.net/index.php/pjcm/article/view/24.