The Association Between Vitamin D Serum Level and COVID-19 Patients’ Outcomes in a Tertiary Center in Saudi Arabia: A Retrospective Cohort Study

Mahmoud A. Alzahrani; Faisal Almalki; Ayman Aljohani; Bassam Alharbi; Bandar Alsulami; Ahmed Alhaddad; Alaa Althubaiti; Bader Khawaji; Fayssal Farahat; Mahmoud  A. Alzahrani; Faisal Almalki; Ayman Aljohani; Bassam Alharbi Sr.; Bandar Alsulami; Ahmed Alhaddad; Alaa Althubaiti; Bader Khawaji; Fayssal Farahat

doi:10.7759/cureus.26266

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