Funding for this research was provided by:
Key Programme (21890380, 21771197, 21720102007, 21821003, 21890382, 21801252)
Pearl River S and T Nova Program of Guangzhou (2017BT01C161)
STP Project of Guangzhou (201607010378)
Text and Data Mining valid from 2019-05-09
First Online: 9 May 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.