Impact of Rapid Correction of Vitamin D Deficiency on Patients with COVID-19 Disease: A Randomized-Controlled Trial

Assessment of Serum Vitamin D Level in Patients with COVID-19 Infection

Assessment of Serum Vitamin D and Total Calcium Levels in COVID-‎‎19 Infected Patients and Their Relation to Disease Severity

Vitamin D Level in Patients with COVID-19 and Its Relationship with Severity of The Clinical Course

Study of Indices Comprising Surrogate Markers of Vitamin D Deficiency

Effect of Vitamin D Supplementation on Post-COVID-19 Manifestations in Menoufia University Hospitals: A Randomized Controlled Clinical Trial

A Comprehensive Analysis and Assessment of Vitamin D with Inflammatory Biomarkers Levels Among Acute COVID-19 Infected Patients

A new investigation into the molecular mechanism of cholecalciferol towards reducing cytokines storm.

Study of vitamin D level in acute coronary syndrome

Could vitamin C improve the therapeutic effect of integrated medicine for COVID-19?