O. I. Badr, W. A. Elrefaey, M. . Shabrawishi, H. M. Assaggaf, and F. . Minshawi, “Diagnostic accuracy of different bronchoscopic specimens in sputum Xpert MBT/RIF- negative pulmonary TB patients”, Multidiscip Respir Med, vol. 17, Oct. 2022, doi: 10.4081/mrm.2022.872.