Ceballos, Roel. “Mortality Analysis of Early COVID-19 Cases in the Philippines Based on Observed Demographic and Clinical Characteristics”. Recoletos Multidisciplinary Research Journal 9, no. 1 (May 31, 2021): 91-106. Accessed July 31, 2021. https://rmrj.usjr.edu.ph/rmrj/index.php/RMRJ/article/view/1047.