Jatav, V. S., Meena, S. R., Jelia, S., Jain, P., Ajmera, D., Agarwal, V., Dayma, C. L., & Arif, M. (2017). Electrocardiographic characteristics of patients with chronic obstructive pulmonary disease and its correlation with disease severity. International Journal of Advances in Medicine, 4(2), 514–518. https://doi.org/10.18203/2349-3933.ijam20171052