Annisa, Ika Nur, Dewi Yuniasih, and Novi Wijayanti Sukirto. “Systematic Review and Meta-Analysis: Effect of Zinc Levels in COVID-19 Patients on Their Clinical Severity”. Ahmad Dahlan Medical Journal 4, no. 2 (November 10, 2023): 179–190. Accessed July 22, 2024. https://journal2.uad.ac.id/index.php/admj/article/view/9015.