Peng, Denggao, Yanzhang Gao, Zhenyu Zhou, Huan Wang, and Anjue Tang. “Early Risk Factors for Severe COVID-19 in Adults With Hypertension”. Cardiology and Cardiovascular Medicine 5, no. 6 (December 21, 2021): 726–738. Accessed June 21, 2026. http://www.fortunejournals.org/ojs/index.php/ccm/article/view/16177.