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Article History
Received: 27 June 2020
Accepted: 17 November 2020
First Online: 2 January 2021
Compliance with ethical standards
:
: All the authors declare that he has no conflict of interest.
: The study was approved by research ethics committee of Cangzhou Central Hospital, Cangzhou, Hebei, China on 6<sup>th</sup> of June, 2019 China with approval number CCH/0331/2019.
