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Article History

Received: 27 January 2021

Accepted: 17 June 2021

First Online: 28 June 2021

Declarations

:

: The retrospective study was approved by the ethics committee of Fujian Cancer Hospital & Fujian Medical University Cancer Hospital (ethical approval number: K2020-035-01), and consent for participation was exempted by the ethics committee.

: The ethics committee agreed that this retrospective study could be carried out and published without the patients’ consent because this study and the paper for publication did not involve the patients’ personal privacy information, and there was no contact with the patients during the study.

: The authors declare that they have no competing interests.