Saenghirunvattana, S., S. Israpaibool, C. Buakham, and N. Kurimoto. “Diagnosis of Peripheral Lung Lesions (PPLs) by Endobronchial Ultrasonography, With Guide Sheath Transbronchial Biopsy”. The Bangkok Medical Journal, Vol. 2, no. 1, Sept. 2011, p. 16, doi:10.31524/bkkmedj.2011.09.003.