Active case finding for tuberculosis through TOUCH agents in selected high TB burden wards of Kolkata, India: A mixed methods study on outcomes and implementation challenges von Dey, Abhijit, Thekkur, Pruthu, Ghosh, Ayan, Dasgupta, Tanusree, Bandopadhyay, Soumyajyoti, Lahiri, Arista, Sanju S V, Chidananda, Dinda, Milan K, Sharma, Vivek, Dimari, Namita, Chatterjee, Dibyendu, Roy, Isita, Choudhury, Anuradha, Shanmugam, Parthiban, Saha, Brojo Kishore, Ghosh, Sanghamitra, Nagaraja, Sharath Burugina

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