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Authors
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Funding
Funding for this research was provided by:
National Natural Science Foundation of China (31700942)
a grant of the German Research Council (DFG: HO 1430/12-1)
Fundamental Research Funds for the Central Universities (SWU2009429)
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Article History
Accepted: 7 April 2021
First Online: 25 May 2021
Declarations
: The authors declare that they have no conflicts of interest with respect to their authorship or the publication of this article. All procedures performed in this study were in accordance with the ethical standards of the ethics committee in Southwest University and with the 1964 Helsinki Declaration and its later amendments. Informed consent was obtained from all participants included in this study.
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