Funding for this research was provided by:
National Natural Science Foundation of China (81770833)
Natural Science Foundation of Hunan Province (2018JJ3721)
Text and Data Mining valid from 2019-12-01
Received: 10 August 2019
Accepted: 16 December 2019
First Online: 26 December 2019
Ethics approval and consent to participate
: All participants gave their written informed consent prior to their participation in our study. The study was carried out in compliance with the Helsinki Declaration II and the Chinese Standards for Good Clinical Practice. The study protocol was approved by the ethics committee of the Second Xiangya Hospital of Central South University (Changsha, China).
: Not applicable.
: The authors declare that they have no competing interests.