Vitamin D and COVID-19: An integrative review. Research, Society and Development, [S. l.], v. 10, n. 9, p. e42110918058, 2021. DOI: 10.33448/rsd-v10i9.18058. Disponível em: https://rsdjournal.org/rsd/article/view/18058. Acesso em: 5 dec. 2025.