Funding for this research was provided by:
National Natural Science Foundation of China (31460496, 31501811)
Text and Data Mining valid from 2019-02-09
Received: 26 July 2018
Revised: 28 December 2018
Accepted: 22 January 2019
First Online: 9 February 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with animals performed by any of the authors.