Sharma, Parag, and Praveen Kr. Thakur. “Profile of Patients With Severe Chronic Obstructive Pulmonary Disease in a Tertiary Care Hospital in Central India”. International Journal of Medical Research and Review 4, no. 4 (April 30, 2016): 664-667. Accessed November 23, 2024. https://ijmrr.medresearch.in/index.php/ijmrr/article/view/535.