Funding for this research was provided by:
Chinese Academy of Medical Sciences Initiative for Innovative Medicine (CAMS-2017-I2M-1-002)
Text and Data Mining valid from 2019-07-15
Received: 27 February 2019
Accepted: 7 July 2019
First Online: 15 July 2019
Compliance with ethical standards
: All authors declare that they have no conflicts of interest to disclose.