Funding for this research was provided by:
National Natural Science Foundation of China (81930096)
Received: 7 June 2020
Accepted: 12 November 2020
First Online: 9 December 2020
Ethics approval and consent to participate
: The study was approved by the Ethics Committee at Xi’an Jiaotong University (Xi’an, China). All subjects gave written informed consent to participate in the study.
: Not applicable.
: The authors declare that they have no competing interests.