Funding for this research was provided by:
the National Natural Science Foundation of China (11571008)
Natural Science Foundation of Inner Mongolia (2016MS0109)
Article History
Received: 27 April 2019
Accepted: 4 September 2019
First Online: 16 October 2019
Competing interests
: As far as we know, there are no conflicts of interest, financial or other conflicts between the designated author and the editors, reviewers, and readers of this magazine.