Daniyar, Pamogsa Ratri Adha, Agus Kristiyanto, and Setyo Sri Rahardjo. “Meta-Analysis the Association Between Chronic Obstructive Pulmonary Disease Comorbidity and COVID-19 Mortality”. Journal of Epidemiology and Public Health 6, no. 2 (April 12, 2021): 222–231. Accessed December 27, 2024. https://jepublichealth.com/index.php/jepublichealth/article/view/395.