GOKTAS, O.; ERCAN, I.; CANAN ERSOY; ARDA UZUNOGLU; FATMA EZGI CAN. Does vitamin D level have an effect on COVID-19 positivity and COVID-19 related mortality? A retrospective study. Journal of the Pakistan Medical Association, [S. l.], v. 72, n. 9, p. 1779–1782, 2022. DOI: 10.47391/JPMA.4593. Disponível em: https://jpma.org.pk/index.php/public_html/article/view/4593. Acesso em: 30 apr. 2026.