Diagnostic Yield of Bronchoalveolar lavage Xpert MTB/RIF Assay (Gene Xpert ® in Sputum Smear Negative Pulmonary Tuberculosis Patients – A One Year Cross Sectional Study . SAARC J. Tuber. Lung Dis. HIV/AIDS. 2019;17(2):1-7. doi:10.3126/saarctb.v17i2.49108