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

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

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

Serum vitamin D and vitamin D receptor (VDR) polymorphisms (<i>FokI</i> and <i>TaqI</i>) as predictors of COVID19 severity. ( Prospective study in a cohort of Egyptian COVID-19 p

A Study of Vitamin D Supplementation to Patients with Chronic Diseases Admitted to Ain Shams University Hospital

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

Vitamin D Status in Egypt and its Seasonal Variation During Infancy and Preschool Children

Vitamin D as a laboratory predictor of mortality in COVID-19 patients admitted in intensive care

Vitamin D Sufficiency Status in a Sample of Egyptian Patients with Different Rheumatological Diseases