T. D. Millenny Zai, R. A. Sitepu, F. Kotsasi, and L. Chiuman, “RELATIONSHIP OF PATIENT CHARACTERISTICS WITH THE SEVERITY OF COVID-19 IN HOSPITALIZED PATIENTS IN ROYAL PRIMA HOSPITAL MEDAN JANUARY- MARCH 2021”, juke, vol. 7, no. 2, pp. 59–67, Dec. 2021.