Funding for this research was provided by:
National Natural Science Foundation of China (81672885)
Text and Data Mining valid from 2020-02-13
Received: 23 July 2019
Accepted: 21 January 2020
First Online: 13 February 2020
Ethics approval and consent to participate
: Written consent was obtained from all subjects. This study was approved by the Ethics Committee of the Xiangya Hospital, Central South University, China.
: Not applicable.
: The authors declare that they have no competing interests.