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Article History

Received: 28 November 2020

Accepted: 2 April 2021

First Online: 13 April 2021

Declarations

:

: This study was approved by the institutional review board of Beijing Chaoyang Hospital and performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. Written informed consent forms were obtained from all participates and their legal relatives.

: Not applicable.

: This manuscript is the authors' original work and has not been published elsewhere. All authors declare no conflict of interest.