Funding for this research was provided by:
National Natural Science Foundation of China (81401731)
Received: 3 September 2019
Accepted: 10 December 2019
First Online: 16 December 2019
Ethics approval and consent to participate
: Informed written consent was obtained from all subjects, and the study was approved by the Ethics Committee of Xiangya Hospital, Central South University.
: Not applicable.
: The authors declare that they have no competing interests.