Toppo, A., D. Sudheer, G. S. Rajawat, and T. Kurian. “Endocrinal Assessment of Chronic Obstructive Pulmonary Disease Patients As Compared to Control Groups”. International Journal of Research in Medical Sciences, vol. 5, no. 4, Mar. 2017, pp. 1640-5, doi:10.18203/2320-6012.ijrms20171279.