Created at	Source	Raw Value	Validated value
March 13, 2021, 12:31 a.m.	usa	Baseline levels of serum vitamin D in COVID-19 patients;Correlation between D-dimer and vitamin D serum levels in COVID-19 patients;Correlation between ferritin and vitamin D serum levels in COVID-19 patients;Correlation between transferrin and vitamin D serum levels in COVID-19 patients;Effects of vitamin D3 supplementation on COVID-19 patients	Baseline levels of serum vitamin D in COVID-19 patients;Correlation between D-dimer and vitamin D serum levels in COVID-19 patients;Correlation between ferritin and vitamin D serum levels in COVID-19 patients;Correlation between transferrin and vitamin D serum levels in COVID-19 patients;Effects of vitamin D3 supplementation on COVID-19 patients