“Characteristics and Factors Associated With Mortality of 200 COVID-19 Patients at a Philippine COVID-19 Tertiary Referral Center”. Acta Medica Philippina 55, no. 2 (April 27, 2021). Accessed April 19, 2025. https://actamedicaphilippina.upm.edu.ph/index.php/acta/article/view/2845.