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Authors
Li, Yan
Sun, Bao
Yu, Shangyao
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (71272150)
National Natural Science Foundation of China (71602005)
National Planning Office of Philosophy and Social Science (15AZD012)
Ministry of Education of the People's Republic of China (15YJC630164)
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Article History
Received: 27 September 2018
Accepted: 8 July 2019
First Online: 16 September 2019
Competing interests
: The authors declare that they have no competing interests.
