Funding for this research was provided by:
National Natural Science Foundation of China (11562014)
National Natural Science Foundation of China (11702149)
Natural Science Foundation of Inner Mongolia (2017MS0108)
Natural Science Foundation of Inner Mongolia (2017MS0105)
Article History
Received: 16 April 2019
Accepted: 11 September 2019
First Online: 29 October 2019
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.