P. . Das, R. . Mondal, K. C. . Sarkar, S. . Ghoroi, P. . Sarkar, and S. . Biswas, “Initial Sputum Smear Grading Is a Predictor of Smear Conversion and Treatment Outcome in Pulmonary Tuberculosis: A Retrospective Cohort Study”, Natl J Community Med, vol. 7, no. 10, pp. 792–796, Oct. 2016.