Setyarini, Indah Bachti, Nurul Ratna, and Ninik Mudjihartini. “Vitamin D and COVID-19: Insight on Mechanism and Implementation in Equatorial Countries”. Journal Of The Indonesian Medical Association 71, no. 2 (June 22, 2021): 61-64. Accessed July 27, 2024. https://mki-ojs.idionline.org/jurnal/article/view/354.