Funding for this research was provided by:
National Natural Science Foundation of China (61702012)
Provincial Foundation for Excellent Young Talents of Colleges and Universities of Anhui Province (gxyq2017026)
University Natural Science Research Project of Anhui Province (KJ2017A361)
Article History
First Online: 11 July 2019
Compliance with Ethical Standards
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: The authors declare that there is no conflict of interests regarding the publication of this paper.