Patients hospitalized with COVID-19 have low levels of 25-hydroxyvitamin D
N. Hutchings,
V. Babalyan,
S. Baghdasaryan,
M. Qefoyan,
N. Sargsyants,
E. Aghajanova,
A. Martirosyan,
R. Harutyunyan,
O. Lesnyak,
A. Formenti,
A. Giustina,
J. Bilezikian,
2021