Srabana Misra Bhagabaty, Amal Chandra Kataki1, Manoj Kalita2, Shekhar Salkar3
Department of Preventive Oncology, 1Director, and 2Department of Epidemiology and Biostatistics, Dr. B. Borooah Cancer Institute, Guwahati, Assam, 3Department of ENT, National Organization for Tobacco Eradication, Goa, India