Gupta, Seema, Varinder Saini, Jasbinder Kaur, Shivani Jaswal, Harjeet Kaur, and Sumeet Kaur. “Cardiac Troponin I As Mortality Predictor in Acute Exacerbation of Chronic Obstructive Pulmonary Disease”. International Journal of Research in Medical Sciences 5, no. 6 (May 27, 2017): 2669–2673. Accessed October 12, 2025. https://www.msjonline.org/index.php/ijrms/article/view/3146.