Febrianti, Ika Kurnia, et al. “The Enhancement of COVID-19 Severity on Coagulation Markers: A Cross-Sectional Study in West Sumatra, Indonesia”. Majalah Kedokteran Andalas, vol. 47, no. 2, May 2024, pp. 139-47, doi:10.25077/mka.v47.i2.p139-147.2024.