Funding for this research was provided by:
Natural Science Foundation of China (No. 61603274)
Natural Science Foundation of Tianjin (No. 18JCYBJC87700)
South African National Research Foundation Grants (No. 112108, No. 112142)
South African National Research Foundation Incentive Grant
Article History
First Online: 28 February 2020
Compliance with ethical standards
:
: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.