Funding for this research was provided by:
National Natural Science Foundation of China (81573983, 81873311, 81674028)
Health Commission of Xi’an city Subject (SZJ201907)
Text and Data Mining valid from 2019-11-08
Received: 30 May 2019
Accepted: 2 October 2019
First Online: 8 November 2019
Consent for publication
: Not applicable.
: The authors declare that they have no competing interests.