Das, Palash, Ranjana Mondal, Kumaresh Chandra Sarkar, Supriti Ghoroi, Piyali Sarkar, and Sukanta Biswas. 2016. “Initial Sputum Smear Grading Is a Predictor of Smear Conversion and Treatment Outcome in Pulmonary Tuberculosis: A Retrospective Cohort Study”. National Journal of Community Medicine 7 (10):792-96. https://njcmindia.com/index.php/file/article/view/1060.