Funding for this research was provided by:
National Natural Science Foundation of China (81800393)
Natural Science Foundation of Hainan Province (2018JJ3783)
Natural Science Foundation of Hunan Province (2018JJ6050)
Fundamental Research Funds for Central Universities of the Central South University (202211807)
Text and Data Mining valid from 2019-10-21
Received: 6 June 2019
Accepted: 24 September 2019
First Online: 21 October 2019
Ethics approval and consent to participate
: The study protocol was approved by the Medical Ethics Committee of the Third Xiangya Hospital and all subjects signed a written consent form.
: Not applicable.
: The authors declare that they have no competing interests.