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Article History

Received: 15 February 2021

Accepted: 28 August 2021

First Online: 8 September 2021

Declarations

:

: This study was approved by the Institutional Review Boards of the Ethics Committees of the lead study centre (Fu Xing Hospital, Capital Medical University, China) and all other participating hospitals (Additional file InternalRef removed). We confirm that all methods were carried out in accordance with relevant guidelines and regulations.Being an observational study, written informed consent from participants to partake into the study was not necessary. Hence, we obtained an informed consent waiver from the above ethical committees.

: Not applicable.

: The authors declare that they have no competing interests.