Funding for this research was provided by:
National Natural Science Foundation of China (81502094)
Received: 8 April 2020
Accepted: 25 July 2020
First Online: 30 July 2020
Ethics approval and consent to participate
: This study protocol was approved by the Ethics Committee of the General Hospital of Ninxgia Medical University (2015-088).
: Not applicable.
: The authors declare that they have no competing interests, and all authors should confirm its accuracy.