Vilela, M. A. C., J. A. Caetano, R. D. N. G. Martins, E. R. Pereira Filho, M. R. Pilotto, E. F. da S. Carvalho, G. C. da S. C. Martins, L. de M. Lopes, D. A. Reck, and F. G. Ramos. “Investigation of Hypovitaminosis D in Patients Infected With SARS-CoV-2 and Its Relationship With Clinical Worsening: A Cross-Sectional Observational Retrospective Clinical Study”. International Journal of Nutrology, vol. 15, no. 4, Jan. 2023, doi:10.54448/ijn22403.