Funding for this research was provided by:
National Natural Science Foundation of China (41571417, U1604145, 61802111, 61872125)
National Science Foundation of the United States (CNS-1253424, ECCS-1202225)
Science and Technology Foundation of Henan Province of China (182102210027, 182102410051)
China Postdoctoral Science Foundation (2018T110723, 2016M602235)
Key Scientific Research Projects for Colleges and Universities of Henan Province (19A413001)
Research Foundation of Henan University (xxjc20140006)
Article History
Received: 13 January 2019
Accepted: 17 June 2019
First Online: 24 June 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.