Funding for this research was provided by:
National Natural Science Foundation of China (81370940)
Received: 24 September 2019
Accepted: 22 April 2020
First Online: 15 May 2020
Ethics approval and consent to participate
: The study was approved by the Ethical Committee of the First Affiliated Hospital of Chongqing Medical University, Chongqing,China.Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.