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Authors
Ramadan, Hala http://orcid.org/0000-0003-3201-5429
Shennawy, Ahmed Mohammed
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Article History
Received: 30 January 2022
Accepted: 27 April 2022
First Online: 22 June 2022
Declarations
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: -Protocol titled: Correlation between vitamin D level & severity, prognostic markers in Egyptian Covid-19 patients-Institution: Cairo University-Decision: approval-Date: 1-11-2021-Protocol number: H-199-2021
: The authors declare that they have no competing interests.
