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Article History

Received: 24 June 2021

Accepted: 17 July 2021

First Online: 1 August 2021

Declarations

:

: This retrospective study involving human participants was in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. This study was approved by the institutional review board of RuiHua Hospital.

: Informed consent was obtained from all individual participants included in the study.

: All authors agreed with the content, all gave explicit consent to submit, and they obtained consent from the responsible authorities at the hospital where the work has been carried out, before the work is submitted.

: The authors declare no competing interests.