M. Quirit Allen, Sorreda Jayson, Pinera Rizalyn, Kate Tobias Karen, Serum Ferritin Level as a Prognostic Marker of 30 days In Hospital Mortality of Coronavirus Disease 2019 (COVID 19) Pneumonia at World Citi Medical Center: A Retrospective, Observational Cohort, Single Center Study, International Journal of Coronaviruses, Volume 3, Issue 3, 2021, Pages 20-29, ISSN 2692-1537, https://doi.org/10.14302/issn.2692-1537.ijcv-21-4025. (https://jndc-chemistryarticles.infoijcv/article/1737) Keywords: Serum Ferritin; COVID-19; Mortality