Received: 8 March 2020
Accepted: 13 February 2021
First Online: 23 February 2021
Ethics approval and consent to participate
: The study was conducted in compliance with ethical standards and approved by the ethics committee of Banaras Hindu University, Varanasi, India (Ref. No. I.Sc./ECM-XII/2018–19/06). Written informed consent form the volunteer donors were obtained following the declaration of Helsinki. No minor was included in this study.
: Not applicable.
: The authors declare that they have no competing interests.