Funding for this research was provided by:
National Natural Science Foundation of China (31800976, 81570212)
Chongqing Science and Health Joint Medical Research Project (2018QNXM024)
Received: 11 March 2020
Accepted: 2 April 2020
First Online: 15 April 2020
Ethics approval and consent to participate
: The study has been performed in accordance with the Declaration of Helsinki and was approved by the Ethics Committee of the First Affiliated Hospital of Chongqing Medical University (Grant No. 20200701). All subjects were well informed.
: Not applicable.
: The authors declare no conflict of interest.