Setiati, Siti, Kuntjoro Harimurti, Eka Dian Safitri, Respati W Ranakusuma, Siti Rizny F Saldi, Muhammad K Azwar, Jessica Marsigit, Yupitri Pitoyo, and Widyaningsih Widyaningsih. 2020. “Risk Factors and Laboratory Test Results Associated With Severe Illness and Mortality in COVID-19 Patients: A Systematic Review”. Acta Medica Indonesiana 52 (3):227. https://actamedindones.org/index.php/ijim/article/view/1560.