Saenghirunvattna, Sawang, Rungsima Saenghirunvattna, and Gerard Lalande. “Endobronchial Valves to Occlude Bronchopleural Fistula and Recurrent Pneumothorax”. The Bangkok Medical Journal 4, no. 1 (September 20, 2012): 19. Accessed August 11, 2020. https://he02.tci-thaijo.org/index.php/bkkmedj/article/view/217957.