Received: 10 January 2021
Accepted: 6 May 2021
First Online: 25 May 2021
: This study was approved by the ethics committee of the Chinese PLA general Hospital. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. Written informed consent was obtained from all patients.
: Not applicable.
: The authors declare that they have no competing interests.