Funding for this research was provided by:
National Natural Science Foundation of China (81672191)
Text and Data Mining valid from 2020-03-10
Received: 3 July 2019
Accepted: 27 February 2020
First Online: 10 March 2020
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee of Xiangya Hospital and the written informed consent was obtained from all patients.
: Not applicable.
: The authors declare that they have no competing interests.