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Authors
Zhu, Jicun
Cui, Lingling
Wang, Kehui
Xie, Chen
Sun, Nan
Xu, Fei
Tang, Qixin
Sun, Changqing https://orcid.org/0000-0001-5509-9237
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Funding
Funding for this research was provided by:
National Social Science Foundation of China (15BSH043)
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Article History
Received: 30 May 2018
Accepted: 13 June 2019
First Online: 2 September 2019
Ethics approval and consent to participate
: The data used in this study is openly available, and there was not any specific human subject involved. So it is not applicable for ethics approval and consent to participate.
: Not applicable.
: We have no conflicts of interest to declare.
