George, J., V., N. A., Nair, T. B. and ., M. (2022) “Prevalence of pulmonary arterial hypertension in severe chronic obstructive pulmonary disease patients attending tertiary care centre Ernakulam”, International Journal of Basic & Clinical Pharmacology, 11(2), pp. 161–166. doi: 10.18203/2319-2003.ijbcp20220416.