Elumalai, S. K., Maiya, A. G. and Chakravarthy, K. B. (2017) “Pulmonary function changes in asymptomatic smokers - a community survey in Udupi, Karnataka, India”, International Journal of Research in Medical Sciences, 5(2), pp. 653–658. doi: 10.18203/2320-6012.ijrms20170169.