Funding for this research was provided by:
National Natural Science Foundation of China (81372562)
Text and Data Mining valid from 2018-07-09
Received: 27 February 2018
Accepted: 18 June 2018
First Online: 9 July 2018
Compliance with ethical standards
: Drs. Xinqiang Wu, Lei Zhang, Zejian Huang, Won Yee Lau, Wenda Li, Pai Lin, and Yajin Chen have no conflicts of interest or financial ties to disclose.