Yudistira, Edo, and Roza Mulyana. “Covid-19 Infection in Elderly With Comorbids”. Biomedical Journal of Indonesia 7, no. 2 (July 2, 2021): 383–397. Accessed October 16, 2024. https://bji-fk.ejournal.unsri.ac.id/index.php/bji/article/view/106.