KESKIN , Olgun; SEREMET KESKIN , Ayşegül; NILGÜN SEREMET. Association between low serum folic acid and vitamin B12 levels with COVID-19 prognosis. Progress in Nutrition, [S. l.], v. 24, n. 3, p. e2022104, 2022. DOI: 10.23751/pn.v24i3.13462. Disponível em: https://mattioli1885journals.com/index.php/progressinnutrition/article/view/13462.. Acesso em: 30 jan. 2025.