Hsia, D., A. Khan, and A. I. Musani. “MINIMALLY INVASIVE DIAGNOSIS AND MEDIASTINAL STAGING OF LUNG CANCER: ENDOBRONCHIAL ULTRASOUND GUIDED TRANSBRONCHIAL NEEDLE ASPIRATION”. Pakistan Journal of Chest Medicine, vol. 18, no. 1, May 2015, http://www.pjcm.net/index.php/pjcm/article/view/80.