Effect of Rapid Correction of Serum Cholecalciferol Deficiency on Protection against Clinical Manifest COVID-19 Infection

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

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

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

Vitamin D Level and Severity of COVID-19 Patients in North Sinai Governorate, A Clinical Prospective Study

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

Knowledge, Practices and Attitudes Regarding Vitamin D Insufficiency among Health Care Workers' Women with COVID-19

The Effectiveness of Vitamin D Supplementation in Chronic Periodontitis Patients: a Randomized Controlled Clinical Trial

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

Vitamin D Deficiency in Subclinical Hypothyroid Dysfunction Patients: A Case Control Study