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Article History

Received: 3 May 2021

Accepted: 1 July 2021

First Online: 13 July 2021

Declarations

:

: All experiments were under the guidelines of the National Institute of Health, the provisions of the Declaration of Helsinki, and the ethics committee of Zahedan University of Medical Sciences, Zahedan, Iran. (Ethical Code: IR.ZAUMS.REC.1399.316). In this study, COVID-19 patients with grade 1 (<i>n</i>  =  21), grade 2 (<i>n</i>  =  20), grade 3 (<i>n</i>  =  20), grade 4 (<i>n</i>  =  21), grade 5 (<i>n</i>  =  21), and healthy individuals (<i>n</i>  =  20) with informed consent were enrolled in the study.

: Not applicable.

: There are no competing interests.