Zhao, Meng
Li, Jipeng
She, Haicheng
Liu, Ningpu
Article History
Received: 16 January 2021
Accepted: 7 May 2021
First Online: 15 May 2021
Declarations
:
: This study was conducted in accordance with the Declaration of Helsinki and approved by the medical ethics committee of Beijing Tongren Hospital. The reference number is TRECKY 2020–071. The need for written informed consent was waived because of the retrospective design and use of deidentified patients data. This was also approved by the medical ethics committee of Beijing Tongren Hospital.
: Not applicable.
: The authors declare that they have no competing interests.