Funding for this research was provided by:
National Natural Science Foundation of China (81502700)
Received: 12 June 2019
Accepted: 7 May 2020
First Online: 1 June 2020
Ethics approval and consent to participate
: The study protocol was approved by the Biomedical Ethics Committee of Xi’an Jiaotong University Health Science Center (Reference No.: 2015–170). Informed consent was obtained from all participants in the study.
: Not applicable.
: The authors declare that they have no competing interests.