Funding for this research was provided by:
National Natural Science Foundation of China (81672268, 81572295)
Zhongshan Hospital, Fudan University (2016ZSFZ56)
Text and Data Mining valid from 2019-07-08
Received: 2 March 2019
Accepted: 25 June 2019
First Online: 8 July 2019
Ethics approval and consent to participate
: Appropriate Ethics Committees of Zhongshan Hospital approved this study to be exempt research.
: Not applicable.
: The authors declare that they have no competing interests.