Funding for this research was provided by:
National Natural Science Foundation of China (U1504310)
Key Scientific Research Projects of Higher Education Institutions in Henan Province (No. 16A430030)
Key Project and Special Foundation of Research, Development and Promotion in Henan Province (No. 182102310076)
Top Doctor Program of Zhengzhou University (No. 32210475)
Joint Fund for Fostering Talents of NCIR-MMT & HNKL-MMT (No. MMT2017-01)
Article History
First Online: 19 February 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.