Received: 7 May 2021
Accepted: 4 August 2021
First Online: 13 August 2021
: This study was approved by the medical ethics committee of Chinese PLA Genera Hospital (S2020-327-01). All procedures performed in the study were in accordance with the ethical standards of the medical ethics committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards, and a written informed consent was obtained from each participant.
: Not applicable.
: The authors declare that they have no competing interests.