@article{Mariani_2021,
title={Association Between Vitamin D Deficiency and COVID-19 Incidence,
Complications,
and Mortality in 46 Countries: An Ecological Study},
volume={19},
ISSN={2326-5108},
url={http://dx.doi.org/10.1089/hs.2020.0137},
DOI={10.1089/hs.2020.0137},
number={3},
journal={Health Security},
publisher={Mary Ann Liebert Inc},
author={Mariani,
Javier and Giménez,
Virna Margarita Marín and Bergam,
Ivana and Tajer,
Carlos and Antonietti,
Laura and Inserra,
Filipe and Ferder,
León and Manucha,
Walter},
year={2021},
month=jun,
pages={302–308} }