Simatupang, Nanda Agustian, Vitri Widyaningsih, and Sumardiyono Sumardiyono. “A Meta-Analysis: Correlation Between Hypertension of Comorbidity on Mortality in Patients With COVID-19”. Journal of Epidemiology and Public Health 6, no. 1 (July 11, 2021): 60–69. Accessed April 28, 2024. https://jepublichealth.com/index.php/jepublichealth/article/view/371.