Funding for this research was provided by:
National Natural Science Foundation of China (81630027)
Received: 2 September 2020
Accepted: 31 March 2021
First Online: 21 April 2021
: This study was approved by the ethical committee of Tangdu Hospital, Fourth Military Medical University (K201907-06), and the consent was waived.
: Not applicable.
: The authors declare that they have no competing interests.