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Authors
Ren, Zichun
Zagortchev, Lyuben
Ma, Junxia
Yan, Ming
Li, Junmin https://orcid.org/0000-0001-8244-0461
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Funding
Funding for this research was provided by:
Inter-governmental S&T Cooperation Proposal between Bulgaria and China (15-2)
National Science Fund of the Bulgarian Ministry of Education and Science (DNTS China 01/5)
Ten Thousand Talent Program of Zhejiang Province (2019)
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Article History
Received: 14 December 2019
Accepted: 25 April 2020
First Online: 9 May 2020
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.
