Supriya, K., Chaudhary, J., & Shamal, S. N. (2017). Oxidative stress in cigarette smoker and smokeless tobacco user among ethnic group north-eastern population of Uttar Pradesh, India. International Journal of Research in Medical Sciences, 5(4), 1439–1444. https://doi.org/10.18203/2320-6012.ijrms20171242