Funding for this research was provided by:
National Natural Science Foundation of China (81571847)
the projects of Jiangsu Province’s Medical Key Discipline (ZDXKA2016025)
Text and Data Mining valid from 2019-10-17
Received: 9 April 2019
Accepted: 5 October 2019
First Online: 17 October 2019
Ethics approval and consent to participate
: This study was reviewed and approved by the Institutional Ethics Committee of Zhongda Hospital. Institutional Ethics Committee of Zhongda Hospital classified it as exemption from Review. All the participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.