Baseline serum vitamin A and vitamin C levels and their association with disease severity in COVID-19 patients: Serum Vitamin A and C levels and COVID-19 severity. Acta Biomedica Atenei Parmensis, [S. l.], v. 94, n. 1, p. e2023007, 2023. DOI: 10.23750/abm.v94i1.13655. Disponível em: https://www.mattioli1885journals.com/index.php/actabiomedica/article/view/13655.. Acesso em: 3 may. 2024.