Shafira Pramesi Putri, et al. “Description of Clinical Severity, Laboratory Results, and ECG of COVID-19 Patients Who Received Doses I and II of the COVID-19 Vaccine at Haji Adam Malik General Hospital from April to August 2021”. Journal of Endocrinology, Tropical Medicine, and Infectious Disease (JETROMI), vol. 4, no. 4, July 2023, pp. 130-8, doi:10.32734/jetromi.v4i4.11000.