Abdollahi A, Sarvestani HK, Rafat Z, Ghaderkhani S, et al. The Association Between the Level of Serum 25(OH) Vitamin D, Obesity, and underlying Diseases with the risk of Developing COVID-19 Infection: A case-control study of hospitalized patients in Tehran, Iran. J Med Virol 2020 Dec 12. doi: 10.1002/jmv.26726.
PMID: 33314166