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Article History

Received: 1 March 2021

Accepted: 30 March 2021

First Online: 13 April 2021

Declarations

:

: All methods were performed in accordance with the relevant guidelines and regulations of the institutional and/or national research committee and the 1964 Helsinki declaration and its later amendments. This study was approved by the Institutional Review Board of the First Affiliated Hospital, Sun Yat-sen University (IRB13–8328), and the Ethics Review Committee of Sun Yat-sen University waived the need for informed consent because there was no active follow-up of study subjects and no data were collected directly from individuals.

: Not applicable.

: The authors declare that they have no competing interests.